Hex Nut Material : Stainless steel Grade : A2-70, A2-80, A4-70, A4-80, 200 Series Standard : Metric DIN 934 , ISO 4032 , IS 1363 , IS 1364 Inches BS 1083 , ANSI B18.2.2 Size in dia : Metric M2 ~ M100 Inches 1/8" ~ 4" Manufacturing by : Cold forming Hot forming