... Washer Size: #6-3", M3-M72 Grade: ASTM F436 Head mark:JM,F436 Material: C1045+Heat Treatment Products information: Flat washerStandard: ASME ... /ANSI B18.22.1 F436/USS/SAE, DIN125A, DIN125B, DIN126, DIN433, DIN440, DIN7349, DIN988, DIN9021Size ... cartons (25kg Max.)+Pallet, or as customer's requirement Black F436 Flat Washer