Mechanical Zinc Plated Steel Allen Bolts UNF

Allen Bolts, Allen Screws and Allen Sets all describe fasteners that are tightened or loosened with an Allen Key, also widely referred to as a Hex (Hexagonal) Socket Key. The Allen Key is inserted into a hexagonal socket within the screw or bolt. Allen Bolts or Screws come with various head styles including Cap Heads, Button Heads and Countersunk Heads, each prefixed commonly with the word Socket or Allen. Allen Sets or Grub Screws tend to refer to screws without a head, where the Allen key socket is integrated with the screw thread.