Inner Diameter (mm): 22.5 Washer Type: Flat Outside Diameter (mm): 30 Inside Diameter (mm): 17 Outer Diameter (mm): 36 Thickness (mm): 1.2 Coating: None Fits Bolt Sizes (mm): M20 Material: Nylon Material Description: Nylon is capable of service temperatures of -40 to 100C and is resistant to fuel and lubricants.