Catalog number: B27-0020 Features: ● A general flat washer to prevent the head of a male screw or a nut from biting into the base material. ● Made of corrosion-resistant stainless steel (SUS304). Specifications: ● Nominal diameter: M20 ● Outer diameter (mm): 40 ● Inner diameter (mm): 21 ● Thickness (mm): 3.0 ● Package: Bolt pack (blister) ● Polished round (large washer) Material/Finish: ● Stainless steel (equivalent to SUS304) Note: ● Items with "small" in the nominal diameter are small round.
