DIN125 A ,DIN9021,DIN440R,DIN126,DIN7989,DIN6340 Flat washer /SAE/USS/SATM F436 Heavy Washer

HV: 120HV,140HV Etc

Diameter:  M3-----M54(#6----2")

Surface: Plain ,black ,zinc plated ,H.D.G.

Flat washer