Metallics JMSHC36SS M3 x 6mm Metric Cap Head Hex Cap Screws - 18-8 Stainless - Each

It's an M3 metric socket cap screw with a 0.5 thread pitch and a 6mm length under the head callout. That's the standard coarse metric pitch for M3, so it runs into any M3 x 0.5 tapped hole or nut. If your print calls for M3 x 6, this is the size.

These are made from 18-8 stainless, the austenitic grade used where corrosion resistance matters more than maximum strength, so they're appropriate for damp or washdown enclosures, exterior junction boxes and coastal-adjacent work. Tensile strength is listed at 1220 N/mm2 minimum with hardness Rockwell C39-44. Note that stainless fasteners in contact with dissimilar metals can still set up galvanic corrosion, so match your mating hardware.

Head and socket geometry follow ISO 4742, so the JMSHC36SS interchanges dimensionally with any other M3 x 6 socket head cap screw built to that standard. Head type is socket, which means it seats in a counterbored hole the same way the screw you are replacing did.

The JMSHC36SS is flagged as both ARRA compliant and Buy American compliant in the manufacturer data, which is what government, school district and transit procurement typically needs on the submittal. Country of origin is listed as multiple, so confirm the origin marking on the jar you receive if your contract requires a single stated source.

They ship in a jar of 100, and 100 count is the order minimum, so you buy them by the jar rather than individually. Handy for MRO cribs and panel shops that burn through small metric hardware. Other sizes and quantities are available by request.

Yes, these retain their mechanical and performance capabilities above ambient temperature, which is why socket cap screws get used around ballast housings, drives and control gear that run warm. The 18-8 stainless body is also what gives them that behavior rather than a plated carbon screw.