M4‑0.70 x 20mm Button Socket Cap Screw – Class 10.9, Zinc‑Baked (Cr+3), ISO 7380

Engineered for high‑strength metric fastening with extended length, this M4‑0.70 x 20mm button socket cap screw is manufactured from heat‑treated Class 10.9 alloy steel and produced to ISO 7380 standards. The 20mm length provides deeper thread engagement for secure fastening in thicker or multi‑component assemblies, while the smooth, low‑profile button head maintains a clean, finished appearance in exposed or clearance‑restricted applications. Featuring an internal hex drive for precise torque control, it is finished with a zinc‑baked coating and trivalent chromium (Cr+3) passivation to enhance corrosion resistance and reduce the risk of hydrogen embrittlement—making it well suited for industrial, automotive, and mechanical use.