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US Fasteners

Wood screw

Wood screws

Screws with a smooth shank and tapered point for use in wood.
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.
Nut

Nuts

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