1) Product Name : Nut 2) Specification: Diameter M6-M40 3) Standard : DIN934, DIN555, DIN439, ISO4032, ISO4034, JIS1181, JIS1190 4) Grade: Carries out 5, 6, 8, 10 or Grade 2 , ASTM A563 , ASTM A194 5) Finish : Black, Yellow Zinc, White Zinc, The Hot Dipping Zinc, chrome-faced.