... .4-No.12,1/4"-1/2" bolt Washer style:internal tooth Features:AISI B18.21.1 SUS410 internal tooth ... washer StandardDIN137, DIN 6797. DIN6798, ANSI B 18.21.1 Material C1010-C1022, 65Mn, stainless steel A2, A4 ... *80cm*14cm Why we are your final decisions?1)Advantage: quick response, first class professional service and ... .dgchuanghe.cnSKYPE:fred06131QQ:498161614 AISI B18.21.1 SUS410 internal tooth washer