- Used to maintain tension and resist loosening due to vibration
- Spreads the load of a bolted joint
- HDG to AS 1650-1989, Section 5
- Conforms to QBCC - Residential Construction
A washer is a thin round plate with a hole that is in the centre. They are used to minimise scouring or scratch damage to mating material as a result of nut rotation.
They are also great to increase the effective bearing surface of the bolt and or nut. That is, to distribute the load of a threaded fastener over a larger area and prevent deformation of the bearing surfaces.