M6‑1.00 x 40mm Button Socket Cap Screw – Class 12.9, Zinc Plated (Cr+3), ISO 7380

Designed for long‑reach fastening in high‑load metric applications, this M6‑1.00 x 40mm button socket cap screw is manufactured from heat‑treated Class 12.9 alloy steel for exceptional strength and durability. Produced to ISO 7380 standards, the extended length allows for deep thread engagement through thicker assemblies, while the smooth, low‑profile button head provides a compact, finished look where clearance or aesthetics are important. A mechanical zinc coating with trivalent chromium (Cr+3) passivation enhances corrosion resistance and delivers a uniform, professional finish for demanding industrial, automotive, and mechanical uses.