How to Reduce Nitrile Glove Rejection Rates at US Customs Without Switching Suppliers
A rejected container at a US port costs you more than the detention and re-inspection fees. It costs you the inventory your customers were waiting on, the margin you already priced in, and sometimes the customer relationship itself. We've worked with importers who've been through this — and in most cases, the rejection wasn't a manufacturing problem. It was a documentation and inspection problem that started weeks before the container left the factory.
The good news: most of the root causes are fixable without changing your supplier. What follows is a practical breakdown of where rejections actually come from and what to do about each one.

Where the Rejection Actually Starts
US Customs doesn't reject gloves because the gloves are bad. They reject shipments because the paperwork doesn't match the product, the labeling doesn't meet FDA requirements, or the entry documentation is incomplete. The physical gloves are almost never the first thing inspected.
The three most common rejection triggers we see on US-bound nitrile glove shipments:
1. FDA registration and 510(k) documentation gaps
Medical-grade nitrile examination gloves entering the US market require FDA 510(k) clearance. The 510(k) number must be on file, the device listing must be current, and the establishment registration for the manufacturing facility must be active. If any of these lapse — or if the 510(k) on the commercial invoice references a different SKU than what's in the container — the shipment gets flagged.
This happens more often than it should. A supplier adds a new size or changes the box count per carton, and nobody updates the device listing. The gloves are identical, but the entry documentation no longer matches the registered device description.
2. Labeling non-compliance
FDA 21 CFR Part 801 sets the labeling requirements for medical devices including examination gloves. The label must include: the device name, intended use, size, lot number, expiration date (if applicable), manufacturer name and address, and the 510(k) number. Missing or incorrect lot numbers are the most common single-field failure we see. Country of origin must also appear on the outer carton per US Customs requirements — separate from the FDA label requirements.
(We've seen containers held because the inner box label said "Made in China" but the master carton didn't. Both are required, and they're checked independently.)
3. AQL failures on physical inspection
When CBP or FDA selects a shipment for physical examination, they pull samples and test against the declared standard — typically ASTM D6319 for nitrile examination gloves. If the gloves fail the AQL sampling or don't meet the dimensional and physical property requirements in the standard, the entire lot is subject to refusal.
The failure mode here is usually one of two things: the factory's outgoing AQL standard is looser than ASTM D6319 requires, or the test reports provided don't reflect the actual production lot in the container.
The Documentation Checklist Before Every Shipment
This is the minimum set of documents that should be verified before a container is loaded. Not before it arrives at port — before it's loaded.
| Document | What to verify |
|---|---|
| FDA 510(k) clearance letter | Number matches the SKU in the shipment; not expired or superseded |
| FDA establishment registration | Manufacturer's registration is current for the shipping year |
| FDA device listing | Listed device description matches size, material, and configuration |
| ASTM D6319 test report | Issued for the production lot, not a generic annual report |
| AQL inspection report | AQL level stated; sampling size and accept/reject numbers shown |
| Commercial invoice | 510(k) number included; product description matches device listing |
| Packing list | Lot numbers traceable to the test reports |
| Country of origin marking | Present on both inner box and master carton |
The most common mistake importers make is treating this as a one-time setup. Device listings need to be updated when SKUs change. Test reports need to reference the actual production lot. An ASTM D6319 report from 18 months ago doesn't cover the container you're importing today — and FDA reviewers know how to check lot numbers against production dates.

How to Fix AQL Failures Without Changing Suppliers
If your shipments have been flagged for AQL failures, the problem is almost always one of three things: the factory's internal AQL standard doesn't match what ASTM D6319 requires, the test reports aren't lot-specific, or the sampling was done on a different production run than what shipped.
Here's how to address each without switching factories:
Align on AQL level explicitly. ASTM D6319 references AQL 1.5 for critical defects (pinholes, tears) and AQL 4.0 for major defects. Many factories default to AQL 2.5 across the board, which is looser on the critical defect category. Get your supplier to confirm in writing which AQL level they're applying to which defect class, and ask for the sampling plan (sample size, accept number, reject number) for your specific order quantity.
Require lot-specific test reports. A test report that says "Lot: as per order" or references a date range rather than a specific lot number is not useful for customs purposes. The lot number on the test report must match the lot numbers on the carton labels and the packing list. This is a documentation discipline issue, not a manufacturing issue — most factories can produce lot-specific reports if you require it as a purchase order condition.
Add a pre-shipment inspection step. Before the container is sealed, have an independent inspector (SGS, Bureau Veritas, Intertek) pull samples from the actual production lot and run an AQL check against ASTM D6319. This costs roughly $200–400 per inspection and eliminates the risk of an AQL failure at the port. The inspection report also gives you a document to present if CBP questions the shipment.
(We coordinate SGS and Bureau Veritas pre-shipment inspections for our buyers as a standard service — it's not an add-on, it's part of how we handle US-bound containers.)
Labeling Corrections You Can Make Now
If labeling is your rejection trigger, some of these can be corrected without touching the production line:
- Lot number format: Confirm with your supplier that the lot number on the inner box label matches the lot number in the AQL report and the packing list. These three should be identical strings, not variations.
- 510(k) number placement: The 510(k) number must appear on the label. If it's missing from the current label artwork, this requires a label revision — but it doesn't require a new 510(k) submission unless the device description itself is changing.
- Country of origin: Must appear on both the inner box and the master carton. If it's only on one, the master carton label can often be corrected with a sticker overlay before shipment — confirm with your customs broker whether this is acceptable for your specific entry.
- Manufacturer address: Must match the FDA establishment registration exactly. If your supplier has moved facilities or changed their registered address, the label needs to reflect the current registration.
Label artwork changes typically require 2–4 weeks to implement across a production run. If you're working with a supplier who can't turn around a label correction in that window, that's worth noting — it's a sign of how responsive they'll be on other compliance issues.
The Pre-Shipment Inspection Protocol That Prevents Most Rejections
Running a structured pre-shipment inspection catches the majority of rejection triggers before the container leaves the factory. Here's the sequence we use for US-bound shipments:
Step 1 — Documentation audit (7–10 days before loading) Pull all required documents and verify against the checklist above. Confirm the 510(k) number, check the device listing is current, verify the establishment registration hasn't lapsed. This takes a few hours and catches the most common rejection triggers before anything is packed.
Step 2 — Label verification (before packing begins) Pull a sample of inner boxes and master cartons from the production lot. Check every required field against FDA 21 CFR Part 801 requirements. Photograph the labels and keep the images on file — if CBP questions the shipment, you have documentation that the labels were verified before loading.
Step 3 — AQL physical inspection (after packing, before container loading) This is where the independent inspector comes in. The inspector pulls samples per the ASTM D6319 sampling plan, checks for pinholes, tears, dimensional compliance, and physical property requirements. The inspection report is issued the same day in most cases.
Step 4 — Lot traceability check (at container loading) Verify that the lot numbers on the cartons being loaded match the lot numbers on the AQL report, the packing list, and the commercial invoice. This is a 30-minute check that prevents the most common documentation mismatch rejection.

What Your Supplier Needs to Provide — and What to Ask For
Most of the fixes above require your supplier's cooperation. Here's what to request, and how to frame it:
Request a documentation package template. Ask your supplier to provide a standard documentation package for every US-bound shipment: 510(k) reference, current establishment registration number, lot-specific ASTM D6319 test report, AQL inspection report with sampling plan, and a packing list with lot numbers. If they can't produce this consistently, that's the real problem — and it's worth addressing directly before the next shipment.
Ask about their internal AQL standard. Specifically: what AQL level do they apply to pinholes and tears, what's the sample size for your order quantity, and what's the accept/reject number? A supplier who can answer these questions precisely is running a real inspection program. A supplier who gives you a vague answer about "strict quality control" is not.
Confirm the 510(k) scope covers your SKUs. If you've added sizes, changed the box count, or switched to a different glove variant (powder-free vs. standard, textured vs. smooth), confirm that the existing 510(k) clearance covers the specific configuration you're importing. This is a 10-minute check with your customs broker that can prevent a multi-week hold.
Build pre-shipment inspection into your purchase order terms. Add a line to your PO that requires an independent pre-shipment inspection report (SGS, Bureau Veritas, or equivalent) as a condition of payment. This shifts the cost and coordination responsibility to the supplier and ensures the inspection happens before the container is sealed.
When the Problem Is Upstream: Supplier Consistency and Lot Integrity
Some rejection patterns don't come from documentation gaps — they come from inconsistent production. If your AQL failures are recurring across multiple shipments, and the documentation is clean, the issue is likely one of these:
Thickness variation across the production run. ASTM D6319 specifies minimum thickness at the palm, finger, and cuff. If a factory's dipping process isn't tightly controlled, thickness can vary enough within a single lot that some cartons pass and others fail. This is a process control problem, not a documentation problem. The fix is a supplier who runs automated dipping lines with continuous bath monitoring — not manual dipping where operator variation is built in.
Pinhole rate above AQL threshold. Pinholes are the most common physical defect in nitrile gloves and the most common cause of AQL failure on physical inspection. A factory running online electrical pinhole detection on every glove will have a fundamentally different pinhole rate than one doing periodic manual water-leak tests. If your supplier can't tell you whether they run online pinhole detection, assume they don't.
Lot mixing. This happens when a factory packs cartons from multiple production runs into a single shipment to fill an order. The lot numbers on the cartons don't match the test report because the test report was run on a different batch. The fix is requiring lot-specific test reports and verifying lot numbers at loading — which is why Step 4 of the pre-shipment sequence above matters.
We run 100% AQL 1.5 outgoing inspection with online pinhole detection on every line. When a buyer asks us for a lot-specific test report, it's a standard request — the data exists because the inspection was actually run on that lot, not reconstructed from a generic annual report.
Practical Next Steps
If you've had a rejection or are trying to prevent one, start here:
- Pull your last shipment's documentation package and run it against the checklist in this article. Most importers find at least one gap on the first pass.
- Contact your supplier and ask for their AQL sampling plan for your order quantity — specifically the accept/reject numbers for pinholes and tears.
- Add independent pre-shipment inspection to your next PO as a condition of shipment.
- Confirm your 510(k) scope covers every SKU configuration in your current order.
If you're sourcing disposable nitrile gloves and want to review your documentation setup before the next shipment, we're happy to walk through it. We work with US importers on compliance readiness as part of the standard order process — not as a consulting service, just as how we handle export documentation.
Send your current SKU list and target market to /rfq and we'll confirm what documentation we can provide for your specific configuration.

















