M2.5‑0.45 x 20mm Button Socket Cap Screw – Class 10.9, Black Oxide, ISO 7380

Designed for precision metric fastening where extended length and dependable strength are required, this M2.5‑0.45 x 20mm button socket cap screw is manufactured from high‑strength Class 10.9 alloy steel and produced to ISO 7380 standards. The 20mm length provides deep thread engagement for secure fastening through thicker or multi‑layer assemblies, while the low‑profile button head maintains a clean, streamlined appearance in exposed or clearance‑limited applications. Featuring an internal hex drive for accurate torque control, it is finished with a thermal black oxide coating that reduces glare, offers mild corrosion resistance, and delivers a uniform technical finish ideal for electronics, instrumentation, and precision mechanical assemblies.