... -M16 1) grade: 4, 6, 2) standards: DIN, ISO 3) finish: plain, black, ZP, HDG ' Hex Nuts Sizes: M6--M48 Standard ... DIN 555 ISO4032 ISO4034 AS1112 BSW UNC Grade: 4, 6, 8, 10Finish Treatment: Plain, Black, ZP ( white, bluish, Yellow), HDG Material ...