Also known as load-indicating washers, are designed to ensure proper bolt tension in bolted connections. They are often used in conjunction with preloaded bolt assemblies,

circular metal disc with a central hole. Typically used to distribute the load over a larger bearing surface either positioned below the head of a bolt or below the nut.

Helical sprig split lock washers are a metal ring that is bent into a helical shape. Split Lock Washers are a left hand helix and allow the nut to be tightened in a right hand direction only. 

Hardened, structural washers, specifically designed for high-strength bolting applications, particularly in construction and engineering projects. They have increased thickness and larger OD

Also known as serrated safety lock washers or toothed washers, are designed to prevent screws, bolts, and nuts from loosening due to vibration or other forces. 

Also known as Form G washers and are characterised by on outer diameter approximately three times the nominal thread diameter. Used for increasing surface and stability during fastening