M3‑0.50 x 20mm Button Socket Cap Screw – A4 Stainless Steel (316)

This M3‑0.50 x 20mm button socket cap screw is manufactured from A4 (316) stainless steel to deliver superior corrosion resistance in marine, chemical, and outdoor environments. The extended 20mm length provides deep thread engagement for secure fastening in thicker or multi‑layer assemblies, while the low‑profile button head offers a smooth, professional finish in visible or clearance‑restricted applications. Featuring an internal hex drive, it is ideal for precision metric fastening where strength, durability, and long‑term corrosion resistance are essential.