Socket screw, hex, allen head, olive dipped, GR 12.9, STD, 10 x 1.5 x 25 mm, Fastbolt.

A socket cap screw, also known as a socket head capscrew, socket screw, or allen bolt, is a type of cap screw with a cylindrical head and hexagonal drive hole. Olive-Drab produces a heavy olive drab chromate coating on zinc or cadmium plated surfaces. It provides the maximum salt spray and abrasion resistance of any type of chromate dip.