40mm

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.

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

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.

Fasteners commonly used in furniture such as connector bolts, barrel nuts and cam locks.

Bolts or screws with a circular ring on the head.

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