... ) Material: stainless steel 4) Surface treatment: plain, zinc, black, nickel, c ) Standard:DIN125, DIN9021 2) Size: M3-M76 3) Material: stainless steel ... 4) Surface treatment: plain, zinc, black, nickel, c1) Standard: ANSI,ASME,DIN,BS,NEF,JIS,GB2) Size: M3-M763 ...