Nut

A type of hardware fastener with a threaded hole.

Nut threaded onto a bolt along with a plain washer.

Bihexagon Nut

A bolt or screw whose cross section of its head is in the shape of a 12 pointed star.

Flange Nut

A nut with a built in washer to spread the load.

Hexagonal Nut

A nut with a plain internal thread and hexagonal in shape.

Nyloc Nut

A nut with an elastic ring that grips the bolt and stops he tendancy for the nut to vibrate loose.

Square Nut

As per the title, a plain thread square nut.

Wing Nut

A nut with wings that allow it to be tightened and released using fingers.

See also: Bolt, Breakaway Torque, Hot Bolting, Internal Thread, Snug Torque, Thread, Washer.