Washers are a small flat ring that is made of metal, rubber, or plastic that is fixed under a nut or the head of a bolt to spread the pressure when tightened or between two joining surfaces as a spacer or seal.

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Fender Washer Flat Washers
Reducing Washers Spacers or Standoffs
Split Lock Washer

Fender Washer
Fender Washers are used to prevent pull-through and provide a greater bearing surface under the fastener. This prevents nuts, bolts or screws from pulling through the base material.

Flat Washers
Flat Washers are for general use and they are positioned under the head of a bolt or a nut in order to provide a smooth bearing surface and distribute the fastener load over a wider area.

Reducing Washers
A Reducing Washer is designed to reduce the size of the knockout in a steel outlet box or other metal enclosure. It is made of galvanized steel and can be used for indoor or exterior applications. A Reducing Washer reduces the size of the knockout in a steel outlet box or other metal enclosure.

Spacers or Standoffs
Spacers or Standoffs are designed to hold materials a predetermined distance away from the surface they are mounted to, or mount two items a set distance apart. Sizes and materials vary depending on the intended usage.

Split Lock Washer
Split Lock Washers are a left hand helix and allow the thread to be tightened in a right hand direction only. Split Lock Washers will continue to hold the bolt against the substrate and maintain friction when loosened slightly, whereas a plain washer will not.