Practical factory spec for bolt, screw and nut plants handling oily blanks, cropped wire, sharp thread crests, coolant and export packing without overbuying bulky cut gloves.
Start With the Fastener Line, Not the Catalogue
A fastener plant normally needs three glove builds, not one heavy glove for every hand. Cold heading and wire feed need abrasion grip on oily wire and bins. Thread rolling, pointing and trimming need cut resistance against burrs and fresh thread crests. Inspection and packing need fingertip feel for M4 to M12 screws, gauges and small cartons. The usual buying mistake is a thick synthetic leather mechanic glove across the whole factory. It looks protective, but workers remove it when they handle vibratory bowls, plug gauges, counting scales or 1 kg bags. For most fastener manufacturing gloves, the working base is a seamless 13 gauge or 15 gauge liner with nitrile palm coating. A 13 gauge HPPE, polyester, glass fibre or steel fibre blend can reach stronger EN 388:2016 plus A1:2018 cut results. A 15 gauge nylon or polyester liner gives better fingertip feel for inspection. Smooth nitrile is poor on oily black oxide screws. Sandy nitrile or micro-foam nitrile gives better contact on oil film and water-soluble coolant. PU is clean and thin, but on oily phosphate or black oxide parts it often becomes slick before the end of one 8 hour shift. Latex grips dry cartons, but we do not recommend it for mineral oil or many metalworking fluids because swelling and grip loss are common.
Cold Heading and Wire Feed: Abrasion First
Cold heading hazards are not only cuts. Operators drag palms across wire coils, transfer trays, machine guards and steel bins for a full shift. Cropped wire ends, headed blanks and washer edges can cut, but abrasion is the constant damage. For low carbon steel, 10B21 boron steel or stainless 304 wire, EN 388 abrasion level 4 is usually more useful than chasing the highest cut number. A practical build is 13 gauge polyester or nylon with nitrile palm and sandy finish. Depending on yarn and thickness, a common target is EN 388:2016 plus A1:2018 around 4X42B for general oily handling. If the buyer uses ANSI, ANSI/ISEA 105 cut A2 or A3 is normally enough for wire feed and headed blank transfer. Move to A4 only where operators regularly touch cropped ends or sharp burrs. Higher cut yarn costs more, traps more heat and reduces the ability to pick up M5 washers or socket screws. Cuff design matters near wire feed equipment. A 7 cm knitted wrist keeps chips out and holds the glove in place. A 10 cm knitted cuff gives more wrist coverage, but it absorbs more oil if workers lean on wet machine beds. We do not suggest loose safety cuffs near rotating shafts, feed rollers or exposed wire because snag risk is real. If the customer needs forearm coverage, specify it as a separate risk decision, not a default upgrade.
Thread Rolling Coolant Changes the Coating
Thread rolling combines neat oil, soluble coolant, extreme pressure additives and fine metal sludge. A glove that feels good in a dry office sample can fail beside a rolling die after two hours. The coating should be chosen by fluid level: micro-foam nitrile for damp oily parts, sandy nitrile for stronger wet grip, and double-dipped nitrile when the palm is constantly wet. For burr handling after rolling, we normally build on a 13 gauge HPPE-glass-polyester liner. A typical construction is flat nitrile first dip for liquid hold-out, then sandy nitrile second dip on palm and fingers for grip. This is more durable in coolant than single micro-foam nitrile, but it is hotter and less breathable. It is still a work glove, not a chemical glove, unless tested to EN ISO 374 for the named chemical. We do not sell double-dipped nitrile fastener gloves as acid, solvent or full chemical protection without permeation data. If operators only touch damp M6 to M16 bolts coming off the roller, a breathable micro-foam nitrile palm is often more comfortable for an 8 to 10 hour shift. If coolant runs down into the cuff or workers sort parts from wet trays, use double dip. If the job includes degreasing tanks, phosphating baths or solvent cleaning, choose a longer PVC or nitrile chemical glove with EN ISO 374 test results, not a knitted dipped glove.
Inspection, Gauging and Packing Need Less Glove
Final inspection is where many buyers waste money. Inspectors using go-no-go ring gauges, plug gauges, calipers and counting scales need clean fingertips more than heavy cut protection. For dry zinc plated screws, a 15 gauge nylon or polyester liner with thin PU palm is often enough. For lightly oiled black oxide, phosphate or plain steel parts, a 15 gauge micro-foam nitrile palm gives better grip. Lint and transfer must be checked. White cotton gloves can shed fibre into 500 g, 1 kg and 5 kg export cartons. Cheap black nitrile can mark bright zinc, nickel or chrome plating if the compound is under-cured or over-pigmented. We ask buyers to run a wipe test on the actual plated fastener, not a clean steel plate. Rub the glove palm across 20 to 30 parts with normal oil level, then check both the part surface and the glove coating. Touchscreen yarn is optional, not automatic. Barcode scanners and tablet entries are common in packing areas, so conductive fingertips can be added to a 15 gauge liner. MOQ usually rises because the yarn package and knitting programme change. For size curves, sizes 7 to 10 cover most fastener factories. Add size 6 only when the workforce has many small-hand users. Oversupplying size 10 is a common inventory mistake.
How We Build a Realistic OEM Spec
A useful enquiry starts with the part, fluid and standard. For example: M6 to M16 zinc plated bolts, oily after thread rolling, burr risk at trimming, EN 388 required, EU distributor carton packing. From that, we would propose two or three builds: 13 gauge polyester sandy nitrile for low cut oily handling, 13 gauge HPPE-glass sandy nitrile for burr handling, and 15 gauge micro-foam nitrile for inspection. For private label, knitted dipped gloves normally use a woven cuff label, printed polybag, header card or printed export carton. Direct logo print on the glove back is possible on some liners, but oil, rubbing and washing make it less durable than a cuff label. Pantone matching is approximate on yarn and nitrile coating. Liner colour, nitrile compound, pigment batch and oven curing temperature all move the final shade. Typical OEM MOQ for a standard yarn and standard coating colour is about 3,000 to 5,000 pairs per SKU. A custom coating colour, uncommon cuff colour, conductive yarn or special size curve can push the MOQ higher. Sampling is usually 7 to 14 days after the spec, size range and artwork are confirmed. Bulk production is commonly 4 to 7 weeks after sample approval and packaging artwork sign-off. We can quote FOB Ningbo or FOB Shanghai; EXW is possible, but most overseas importers prefer FOB because export handling is clearer.
Quality Checks Before Bulk Production
Lab results are not enough for fastener manufacturing gloves. If CE documentation is required, ask for EN 388:2016 plus A1:2018 reports from a recognised lab and make sure the report matches the liner, coating and gauge being ordered. Then run a shop-floor trial with the real parts: oily blanks, fresh thread crests, burr trays, counting scale and export carton. A glove can pass a cut test and still fail if the nitrile peels in coolant. Incoming or pre-shipment inspection should check size length and palm width, pair weight, coating coverage, cuff elasticity, liner holes, oil contamination, colour deviation, label position, packing count and carton strength. For normal B2B industrial orders, AQL 2.5 for major defects and AQL 4.0 for minor defects is a workable starting point. For vending-machine supply or national distributor programmes, buyers often request tighter visual and packing controls. Carton planning affects cost. Knitted dipped gloves are bulky for their unit value. A common export carton holds about 120 to 240 pairs depending on gauge, coating thickness and cuff length. A 13 gauge double-dipped cut glove packs fewer pairs than a 15 gauge PU inspection glove. The purchase order should state size ratio clearly, such as 10 percent size 7, 30 percent size 8, 40 percent size 9 and 20 percent size 10. Without that, factories may ship an even size split that leaves the buyer short of medium sizes and overstocked with large gloves. We do not promise one universal glove for every station; the lower-cost, safer route is matching each glove to the actual fastener process.
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This guide is updated when industry conditions change - the last revision was based on Q1 2026 fabric pricing and CN-EU freight rates.