0.4mm

Metric Fasteners

Metric machine screw

Machine screws

Screws with machine threads for use with a nut or in a tapped hole.
Metric socket product

Socket screws

Screws with an allen wrench drive.
Set screw

Set screws

Screws with no head and machine threads for use in a tapped hole.
Metric nut

Nuts

Nuts have internal machine threads, for use with machine thread bolts and screws.
Metric shoulder bolt

Shoulder bolts

Screws with an unthreaded shoulder that is larger in diameter than the threads. Also known as stripper bolts.