How we inspect A2-70 and A4-80 fasteners

Every stainless lot at EPPE goes through a written inspection plan before it is released to the warehouse.

Incoming material

We buy 304 / 316 wire rod with mill 3.1 certificates and run PMI spot checks on diameter and chemistry.

In-process

Cold-heading and thread-rolling are sampled hourly. Threads are checked with go/no-go gauges; heads are checked for height, width across flats and socket depth.

Outgoing

Hardness, tensile (where required) and 48–96 h neutral salt spray are recorded. Packing photos and carton marks are archived with the lot number so distributors can trace shipments.