stud bolts 1.Bolt Size,M2-M100 2.Material,stainless steel,carbon ... .Zinc Nickel plated,Black Oxide,Hdg astm a325 stainless steel hex bolts 1. Standard:DIN, ANSI, BSW, JSB ans ISO standard or ... steel or according require3. Grade: Metric standard: Grade 4.8, Grade6.8, Grade8.8, Grade10.9,Grade12.9.Inch standard: Grade2, Grade5, Grade8 ...