M8‑1.25 x 40mm Button Socket Cap Screw – Class 12.9, Zinc Plated (Cr+3), ISO 7380

Designed for extended‑length, high‑strength metric fastening, this M8‑1.25 x 40mm button socket cap screw is manufactured from heat‑treated Class 12.9 alloy steel for superior tensile performance. Produced to ISO 7380 standards, the longer shank allows for deep thread engagement in thicker or multi‑component assemblies while maintaining a low‑profile button head for a clean, streamlined appearance. An internal hex drive ensures reliable torque application, and the mechanical zinc plating with trivalent chromium (Cr+3) passivation provides added corrosion resistance and a durable, uniform finish for industrial, automotive, and machinery applications.