Catalog number: W-SS-0004 Features: ● A general flat washer to prevent the head of a male screw or a nut from biting into the base material. Specifications: ● Nominal diameter: M4 ● Outer diameter (mm): 10 ● Inner diameter (mm): 4.5 ● Thickness (mm): 0.8 ● Surface treatment: Unichrome ● Although it is an old JIS standard, it is still in general use today. Material/Finish: ● Cold-rolled steel plate (SPCC) ● Surface treatment: Unichrome plating finish
