Catalog number: B726-0020 Features: ● A general flat washer to prevent the head of a male screw or nut from biting into the base material. ● Trivalent chromate product with low environmental impact. Specifications: ● Nominal diameter: M20 ● Outer diameter (mm): 40 ● Inner diameter (mm): 21 ● Thickness (mm): 3.2 ● Surface treatment: Trivalent chromate (white) ● Package: Bolt pack (blister) ● Polished round (large washer) Material/Finish: ● Cold-rolled steel plate (SPCC) ● Surface treatment: Trivalent chromate finish (white) Note: ● Items with "small" in the nominal diameter are small round.
