M2‑0.40 x 3mm Button Socket Cap Screw – Class 10.9, Black Oxide, ISO 7380

Designed for precision fastening in small‑scale metric applications, this M2‑0.40 x 3mm button socket cap screw is manufactured to ISO 7380 standards from Class 10.9 alloy steel for dependable strength and performance. The compact length and low‑profile button head make it ideal for tight‑clearance or appearance‑sensitive assemblies, while the internal hex drive allows for accurate torque control. Finished with a thermal black oxide coating, it offers mild corrosion resistance, reduced glare, and a clean, technical appearance suited for electronics, instrumentation, and light mechanical assemblies.