... according to the quantitySpecifications:Name:T-head boltsStandard: GB37,DIN,JIS,ANSIGrade:Class 4.8, Class 6.8, Class 8.8, Class 10.9, Class ... 12.9Size: M(4-33)*(8-100mm)Detailed Description:Hexagon ... )MaterialSS A2(304),A4(316)SizeM(8-10)*(16-100mm)GradeClass 4.8, Class 6.8, Class 8.8, Class 10.9, Class 12.9StandardGB37 ...