Hex Nut, Nut,DIN934 Hex Nut M3-M42 Zinc,Plain,Black,HDG Carbon Steel,Class6,8,10,2H ISO9001:2000 Hex Nuts, Nuts,Hexagon NutsCertificate:ISO9001 ... ;2000Product name:HEX NUTS, HEXAGON NUTSMetric Standard:DIN934,DIN555,DIN6915,ISO4032, ... ,such as "T 4" "T8" etc.Material: 1. Low Carbon Steel: C1008/C1010/C10152. Middel Carbon Steel: C1030/1035 ...