An approved sample can be perfect and the shipment can still be wrong.
The dimensions may have shifted slightly. A fastener may have been replaced. Suction cups may have deformed during packing. One carton may contain the correct instruction card while another contains an older version. None of these problems is obvious from the supplier’s pre-shipment photographs.
That is why incoming quality inspection matters.
For a distributor or private-label buyer, the purpose of inspection is not simply to find damaged products. It is to answer three more important questions:
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Does the delivered batch match the approved product?
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Can the products be assembled and used as intended?
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Is the batch consistent enough to release for sale?
A useful inspection plan should answer those questions before inventory enters the warehouse, reaches a marketplace fulfilment centre or is shipped to customers.
Begin With the Approved Reference
Incoming inspection needs a comparison point.
That reference may include:
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An approved physical sample
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Product drawings and controlled dimensions
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Bill of materials
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Approved component list
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Color and finish standards
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Logo artwork and position
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Assembly instructions
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Retail packaging
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Packing list
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Product and carton labels
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Accepted application boundaries
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Defined inspection methods
The physical reference is often called a golden sample, master sample or approved production sample.
Keep one labelled sample with the buyer and, where practical, a matching reference with the supplier. The label should show the supplier, product code, buyer SKU, revision, approval date and approver.
Photographs help, but they cannot show material grade, thread engagement, suction performance or whether a bracket dimension has changed by several millimetres.
The purchase order should state that production must match both the documented specification and approved sample. Any change to materials, magnets, suction cups, fasteners, protective parts, finish, packaging or instructions should require written approval.
Our guide to questions to ask a Starlink Mini mount supplier explains how to establish this reference before ordering.
Define the Inspection Lot
Do not treat every product arriving on the same day as one inspection lot.
A lot should normally contain units that share the same:
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SKU
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Product revision
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Production run
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Main materials
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Component configuration
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Packaging version
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Manufacturing location
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Intended market
If magnetic and suction cup mounts arrive together, inspect them as separate lots. If half the shipment uses one instruction version and the other half uses another, separate those units as well.
Mixing revisions can hide problems. An acceptable result from one configuration should not compensate for defects in another.
Record the following before opening cartons:
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Purchase order number
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Supplier invoice
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SKU and product name
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Lot or batch number
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Total quantity
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Number of master cartons
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Units per carton
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Production date
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Inspection location
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Inspector
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Inspection date
This information connects the result to the actual inventory.
Set Defect Classifications Before Inspection
A defect should not be classified only after it appears.
Define critical, major and minor defects in advance.
| Defect class | General meaning | Possible mount examples |
|---|---|---|
| Critical | Creates a safety, regulatory or serious compliance risk | Structural fracture, dangerously sharp edge, unsecured load-bearing component or an unapproved change to a safety-related part |
| Major | Prevents normal use, creates a likely return or materially contradicts the approved specification | Mount does not fit the terminal, missing hardware, incorrect threads, suction cup cannot seal, wrong bracket dimensions or unusable instructions |
| Minor | Does not prevent normal use but falls outside the agreed appearance or workmanship standard | Small cosmetic mark, slight logo-position variation or non-critical packaging imperfection |
These examples are not universal classifications.
A cosmetic defect on a hidden component may be minor. The same defect on a premium retail-facing surface may be major. A loose fastener may be major in one location and critical in another.
The intended use and product claim also matter. If a magnetic mount is sold for on-the-road use, undocumented changes to its magnetic feet, bracket retention or structural hardware require more serious treatment than a change to an internal packaging insert.
Write the classifications into the inspection specification rather than leaving them to individual judgement.
Choose a Sampling Method
Not every order requires every unit to be opened and inspected. But “check a few cartons” is not a sampling plan.
A formal plan should define:
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Lot size
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Inspection level
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Sample size
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Defect categories
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Acceptance and rejection numbers
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How units will be selected
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Which tests apply to every sampled unit
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Which tests use a smaller or destructive-test subset
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What happens if the result fails
The current ISO 2859-1:2026 standard provides AQL-indexed acceptance-sampling schemes for lot-by-lot inspection by attributes. A qualified quality team can use such a framework to determine sample sizes and acceptance rules.
AQL does not define the product specification. It also does not prove that a mount is safe for a particular vehicle or operating mode.
It only helps answer whether a defined lot should be accepted based on the defects found in a defined sample.
First production orders, new suppliers, revised products and previous problem batches may justify tightened inspection or 100% inspection of selected characteristics. Stable repeat orders may follow a different plan.
Do not copy an AQL number from another product without reviewing the actual risk.
Select Units From Across the Shipment
The easiest carton to inspect is not necessarily representative.
Select samples from:
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Different master cartons
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The top, middle and bottom of the pallet
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Different sides of the shipment
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Early and later carton numbers
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More than one production or packing shift, where traceable
Record the carton number for each sampled unit.
This allows the buyer to identify whether a problem is random or concentrated. If six defective suction cups all come from one carton, the issue may relate to packing pressure or a specific component batch. If the same defect appears across the shipment, the cause is likely broader.
Avoid allowing the supplier or warehouse team to prepare the inspection samples in advance. Selection should be random and controlled by the inspector.
Checks That Apply to Both Mount Types
Every sampled magnetic or suction cup mount should pass a basic identity and completeness inspection.
Product identity
Confirm:
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Correct buyer SKU
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Correct supplier model
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Correct product revision
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Correct color
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Correct logo or private-label marking
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Correct terminal compatibility
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Product matches the approved photographs and reference sample
A similar-looking bracket is not necessarily the approved product.
Parts count
Open the package and compare every component with the packing list.
Check:
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Main brackets
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Support arms or rails
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Magnets or suction cups
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Screws
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Nuts
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Washers
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Knobs
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Protective pads
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Tools
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Replacement parts
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Instructions
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Labels
Count parts rather than checking only whether a hardware bag is present.
Dimensions
Use suitable measuring equipment to check controlled dimensions such as:
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Overall size
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Bracket width and length
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Hole position
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Slot dimensions
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Component thickness
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Fastener length and diameter
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Terminal contact points
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Logo position
The inspection sheet should show the nominal dimension and tolerance. “Approximately 200 mm” is not an acceptance criterion.
Fit and assembly
Assemble the product without supplier assistance.
Use an actual Starlink Mini or an approved inspection fixture to confirm:
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The terminal enters the mount correctly
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Contact points align
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No part must be forced
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Fasteners engage properly
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Adjustment features operate normally
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The terminal cannot move beyond the approved limit
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Assembly matches the customer instructions
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Disassembly does not damage the product
A dimensional inspection cannot replace a complete assembly check.
Workmanship
Inspect for:
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Burrs and sharp edges
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Cracks
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Distortion
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Poorly formed holes
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Welding or forming defects
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Loose inserts
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Exposed metal
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Peeling paint or coating
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Uneven finish
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Oil, dust or production debris
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Corrosion
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Damaged threads
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Tool marks outside the agreed cosmetic limit
View the product under consistent lighting and from a defined distance when judging cosmetic defects.
Magnetic Mount Inspection Points
The SatHarbor Starlink Mini Magnetic Mount is designed for suitable, sufficiently flat ferrous magnetic metal. Metal alone is not enough: aluminum, fiberglass, glass, plastic and other non-magnetic materials are not compatible with direct magnetic attachment.
Incoming inspection should verify both the physical product and the information supplied with it.
Inspect every magnetic foot
Check:
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Correct number of feet
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Correct dimensions
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Correct thread or attachment method
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Secure connection to the bracket
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Consistent protective contact surface
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No exposed sharp metal
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No cracks, cuts or displaced covers
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No metal particles attached to the contact area
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No visible substitution from the approved component
Small metal fragments beneath a magnetic foot can damage a painted surface. Keep the inspection bench and contact faces clean.
Check full contact
Place the assembled mount on the defined inspection fixture or steel test panel.
Confirm that:
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Every magnetic foot makes full contact
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The bracket does not rock
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No foot sits above the surface
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The frame is not twisted
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Fasteners do not touch the test surface
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The mount can be lifted and placed without dragging
Use the same test surface and method from one batch to the next. Results from a thick laboratory steel plate should not be treated as proof of identical performance on every painted vehicle roof.
Vehicle steel thickness, finish, curvature and contamination can all change the result.
Compare holding performance consistently
If holding force is part of the product specification, define:
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Test fixture
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Steel material and thickness
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Surface finish
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Pull direction
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Loading point
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Test speed
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Temperature
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Whether the complete mount or one foot is being tested
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Minimum result
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Number of units tested
A hand-pull test can identify an obviously weak unit. It cannot provide a controlled measurement.
Separate batch inspection from road-use validation
If the product is marketed for on-the-road use, engineering validation should already exist for the exact design, materials and installation conditions.
Incoming inspection then verifies that the delivered batch still matches the validated configuration.
Changing a magnet, protective cover, fastener, bracket thickness or terminal-retention feature can affect that configuration even when the product still looks similar.
A static magnetic pull result or a statement that the mount “feels strong” does not newly validate:
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Vehicle-speed performance
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Crosswind loading
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Braking and acceleration
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Road vibration
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Repeated impact
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Cable movement
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Different vehicle panels
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Long-term environmental exposure
Treat road-use validation and production-lot inspection as connected but separate controls.
Suction Cup Mount Inspection Points
The SatHarbor Starlink Mini Suction Cup Mount requires a clean, dry, smooth, sufficiently flat and non-porous surface where every cup can make full contact. Suitable glass, sunroofs and qualifying smooth panels can provide a compatible contact surface.
Surface compatibility alone does not establish suitability for movement or environmental exposure. Packaging and resale materials should direct buyers to check full contact, curvature, seals, gaps, trim, vibration or movement, sky visibility, cable routing, nearby bodywork and exposure at the exact location. SatHarbor does not currently promote the suction mount as an exterior high-speed driving solution.
Inspect the sealing surface
Check every sampled suction cup for:
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Cuts
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Cracks
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Deformed edges
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Permanent folds
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Surface contamination
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Mold-release residue
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Embedded particles
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Uneven thickness
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Discoloration
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Hard or brittle areas
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Inconsistent shape
A cup may appear complete while a small defect in the sealing lip prevents reliable attachment.
Use a controlled glass test
Test the assembled mount on a standard clean glass panel using a defined procedure.
Record:
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Glass type and condition
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Cleaning method
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Surface temperature
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Installation method
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Number of activation movements
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Dwell time
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Load condition
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Acceptance result
The acceptance time and test load should come from the approved specification. Do not invent a short test during inspection and assume it represents the customer’s full use period.
Check repeated operation
Where the product specification requires it, test repeated attachment and release on a defined subset.
Confirm that:
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The activation mechanism moves correctly
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Every cup forms full contact
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The mount remains stable for the specified test period
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Release tabs or levers work normally
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Removal does not tear or permanently deform the cups
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Reinstallation remains possible
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No unacceptable residue remains on the glass
Do not place suction cups across rubber seals, window edges, textured frit areas or strong curvature during the test.
If customers may have coated or filmed glass, the product information should tell them to verify compatibility with the vehicle or film provider.
Check Packaging as Part of the Product
A functional mount can still create a poor commercial shipment if its packaging is wrong.
Inspect:
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Retail-box dimensions
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Product orientation
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Internal protection
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Separation between painted parts
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Small-parts bags
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Instruction-card version
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Barcode
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QR code
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Product label
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Country or importer information, where required
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Carton quantity
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Master-carton markings
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Gross weight
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Sealing method
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Transit damage
Shake the packed unit gently using the agreed method. Components should not move in a way that causes scratching, impact or loss of small parts.
The packaging and instructions must also describe the correct product.
For the magnetic version, verify that suitable magnetic metal surfaces and excluded materials are clearly distinguished.
For the suction version, verify that the artwork and instructions state the full contact criteria: clean, dry, smooth, sufficiently flat and non-porous surfaces with every cup fully supported. The materials must not imply that surface contact alone qualifies an exterior high-speed driving installation.
The OEM launch-pack guide explains how to align the physical product, box, instructions and online listing.
Verify Batch Traceability
Each inspected lot should be traceable beyond the purchase order.
Useful identifiers may include:
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Production date
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Batch code
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Assembly line or team
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Component lot
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Packaging revision
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Inspection record
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Carton number
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Destination shipment
A complex digital system is not always necessary. A simple batch code on the product, label or instruction card may be enough if it connects to the supplier’s production records.
Without traceability, one complaint can place the entire inventory under suspicion.
With traceability, the buyer can determine whether the issue affects one unit, one carton, one production batch or several shipments.
When to Hold or Reject a Shipment
Place the lot on hold when:
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A critical defect is found
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The sample exceeds the agreed rejection limit
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A component has changed without approval
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Dimensions do not match the controlled specification
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Fit differs from the approved sample
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A safety-related part cannot be traced
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Instructions contradict the intended use
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Products and packaging show different revisions
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Batch identification is missing
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Defects cluster in a particular carton or production group
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The supplier’s rework cannot be verified
Do not accept a lot only because most units look good.
The decision should follow the written sampling plan.
If rework is proposed, define:
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Which units are affected
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How the supplier will identify them
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What rework will be performed
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Who will approve the method
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How the reworked units will be inspected
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Whether the full lot requires new sampling
A repaired lot should not be released solely on the supplier’s statement that the problem has been fixed.
Document the Corrective Action
When a defect is confirmed, send the supplier a structured record containing:
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Purchase order and lot number
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SKU and revision
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Carton and sample-unit number
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Defect classification
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Photographs
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Measurements
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Test method
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Number inspected
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Number defective
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Required containment
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Requested response date
The supplier response should explain:
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Immediate containment
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Root cause
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Affected quantity
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Correction or rework
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Preventive action
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Verification method
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Whether previous or future batches may be affected
Keep the inspection result and corrective-action record with the batch history.
Repeated problems should influence future inspection intensity, order size and supplier status.
A Practical Incoming Inspection Checklist
Before releasing the shipment, confirm that the inspection record answers each of these questions.
Product control
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Is the SKU correct?
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Does the revision match the purchase order?
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Does the product match the approved sample?
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Were any materials or components changed?
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Is the batch traceable?
Fit and assembly
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Is the complete parts set present?
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Do all fasteners fit?
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Can the product be assembled from the supplied instructions?
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Does an actual Starlink Mini or approved fixture fit correctly?
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Do adjustment and retention features work?
Magnetic version
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Are all magnetic feet correct and secure?
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Are contact surfaces clean and protected?
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Does every foot make full contact with the defined test panel?
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Does the unit meet the documented holding-force check?
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Does the delivered construction match any validated road-use configuration?
Suction version
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Are the cup edges clean and undamaged?
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Do all cups seal on the controlled glass panel?
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Does the mount remain attached for the specified test period?
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Do release mechanisms work?
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Do the instructions state the qualifying surface conditions, full-contact requirement and location-specific use limits?
Packaging and information
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Is the retail package complete?
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Are painted components separated?
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Do barcodes and QR codes work?
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Does the instruction version match the product?
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Are surface requirements and exclusions clear?
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Do carton quantity and markings match the shipping documents?
Release decision
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Were samples selected from several cartons?
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Were defects classified correctly?
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Does the lot meet the acceptance plan?
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Has any necessary corrective action been closed?
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Is the inspection record stored with the batch?
If any answer is uncertain, keep the inventory on hold until the evidence is complete.
Frequently Asked Questions
Does an approved sample replace incoming inspection?
No. The approved sample establishes the reference. Incoming inspection checks whether production matches that reference.
Does every unit need to be inspected?
Not always. The appropriate method depends on product risk, order size, supplier history and the characteristic being checked. First orders and safety-related characteristics may justify more intensive inspection.
Does passing an AQL inspection mean the shipment has no defects?
No. Acceptance sampling provides a structured lot decision based on a sample. It does not guarantee that every unit is defect-free.
Can the supplier perform the inspection?
Yes, but the buyer should still define the specification, sampling method, evidence and acceptance rules. Independent inspection or buyer verification may be appropriate for new suppliers or higher-risk orders.
Can a static magnetic pull test prove that a mount is safe while driving?
No. A controlled static test can compare production consistency under defined conditions. It does not by itself validate a complete vehicle installation under speed, vibration, braking, crosswind and road-shock conditions.
Should magnetic and suction cup mounts use the same inspection checklist?
They can share identity, fit, workmanship, packaging and traceability checks. Their attachment tests and use boundaries should remain separate.
Inspect the Product You Plan to Sell
Incoming inspection works best when it is designed before the purchase order is placed.
The buyer, supplier and inspector should agree on the product revision, controlled dimensions, components, application boundaries, defect classifications, sampling method and evidence required for release.
That turns inspection from a last-minute carton check into a repeatable commercial control.
SatHarbor supports wholesale and private-label buyers with magnetic and suction cup mount samples, product specifications, OEM packaging and order planning. Buyers can contact the SatHarbor OEM team to discuss their intended market, quantity and inspection requirements.
Starlink is a trademark of SpaceX. SatHarbor products are independent compatible accessories and are not affiliated with, endorsed by or manufactured by SpaceX. Buyers remain responsible for defining product requirements, inspection criteria, regulatory obligations and market-specific safety information.

