Material: HARDENED STEEL

Washer Type: FLAT WASHER

Fits Bolt Sizes (mm): M18

Material Description: Hardened Steel

Coating: Zinc Phosphate + Oil offers corrosion protection up to the point of assembly (recommend painting for external applications). Salt spray resistance of 72 hours to red rust. Coating color - dark grey to black.

Inner Diameter (mm): 20

Outer Diameter (mm): 33.5

Thickness (mm): 5

Inside Diameter (mm): 20

Outside Diameter (mm): 33.5