Hexagonal Nut

Hexagonal bolt with threads

Cap-Nut

Dome Nut

Capstan Nut

Wing Nut

Locknut

Spanner

Spur Gear

Helical Gear

Bevel Gear

Wall Bracket

Pulley

V-Belt Pulley

Disk Crank

Overhung crank

Eccentric sheave

Piston