... range: M16,M30 2grade:4,6,8,10 3standard:DIN,ANSI,JIS,AS,BS,UNI,ISO,GB 4certificata:SGS M4-M20 ... nut product namecap nutsproducer' s markSDLstandardASTM, BS, UIC, JIS, GOST, DIN, AS, GB and so on.material materials:carton steel,stainless steelsizeby clientssurface ... .S.A., Canada, Cuba, Germany, Japan, Singapore, Malaysia and Africa and so on. Pictures:1.Certificate:ISO9001:2008,SGS2.Various MEDALS ...