... A2(SS304)A4(SS316) Standard: GB37,DIN,JIS,ANSI Advantage:Mainly used in the solar equipement Quick ... according to the quantitySpecifications:Name:T-boltsStandard: GB37,DIN,JIS,ANSIGrade:Class 4.8, Class 6.8, Class ... .8, Class 10.9, Class 12.9StandardGB37,DIN,JIS,ANSIColorsilver,plainTechnology:cold forging,heat treatment,Packing:in bulk, ... ,washer and relative hardwarePhotoes as following: T-type bolts