12mm

Bolts with hexagonal heads and machine threads for use with a nut or in a tapped hole. Also known as hex cap screws or machine bolts.

Flange bolts have a flange on the bottom of the head that distributes the load like a washer.

Bolts with no drive and machine threads for use with a nut.

Screws with an Allen wrench drive.

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

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

A fully threaded rod with no head or drive. Commonly used in manufacturing, automotive, electrical, plumbing, and general construction applications.

Bolts or screws with a circular ring on the head.

For adding a machine thread to material that otherwise cannot be tapped.