... . Surface: Black, ZP, HDG 3. Grade: 4.8,6.8,8.8 4. Standards: DIN933/931 Hex Flange Nuts1. Material: 35k,q235, c10102. Surface: Black ... size Product name:DIN933/DIN601/ISO4017 hex head boltGrade:4.6,4.8,5.6,5.8,6.8,8.8 Size:M6*16-50 M8*20 ... *50-100 Product name:DIN931/DIN960/ISO4014 hex head boltGrade: 4.6 4.8 5.6 5.8 6.8Finish:plain,black,zinc plated ...