Washers

PRODUCT	SIZE	HARDNESS	STANDARD
Square Section Spring Washer	3mm to 39mm	HV (430 to 530)	DIN 7980
Flat Section Spring Washer	3mm to 39mm	HV (430 to 530)	DIN 127 B
Hardened Washer	12mm to 30mm	HV (300 to 370)	IS 2016
Hardened Steel Washer	12mm to 56mm	Rockwell 26 to 45 (HDG) Rockwell 38 to 45 (Coated)	ASTM F436M

PRODUCT	SIZE	TENSILE STRENGTH	STANDARD
USS Plain Washer	1/4 to 1 1/2	HRC 38-45	ASME B18.21.1-A
SAE Plain Washer	1/4 to 2	HRC 38-45 (Coated) HRC 26-45 (HDG)	ASME B18.21.1-A
Spring-Lock Washer	1/4 to 1 1/2	HRC 38-46	ASME B18.21.1
Hardened Washer	1/4 to 1 3/8	HRC 38-45 (Coated) HRC 26-45 (HDG)	ASTM F436