5mm, 316

Metric Fasteners, 5mm, 316 (A-4)
Machine screws Screws with machine threads for use with a nut or in a tapped hole.	Socket screws Screws with an Allen wrench drive.
Set screws Screws with no head and machine threads for use in a tapped hole.	Shoulder bolts Screws with an unthreaded shoulder that is larger in diameter than the threads. Also known as stripper bolts.