a pointed metal screw formed with a sharp thread of comparatively coarse pitch for insertion in wood.

washer with a particularly large outer diameter in proportion to its central hole.

a nut with a pair of projections for the fingers to screw it on.

a heavy wood screw with a square or hexagonal head.

It looks like a typical flat washer on one end with an attached sleeve, or bushing, at the other end.

a threaded fastener for joining two male threads

a special type of fastener that's designed for use with sheet metal

a special type of washer that's designed to create tension so that the bolt doesn't loosen or otherwise come out of its installed position.

a nut that has a wide flange at one end that acts as an integrated washer.

standard screws but with a unique head, making it nearly impossible to remove with common tools.

has a sunken top designed to catch the fastener.

a nut with a hexagonal shape.

a fastening device similar to a bolt but having a socket in its head which allows it to be turned with a screwdriver.

a subtype of washers that are conical in shape to prevent them from resting flush against a surface without the presence of a load

It is used to bolt thin sheet metal parts to larger, often billet or forged, parts