Material: carbon steel, alloy steel Grade: 4.8 6.8 8.8 10.9 12.9 Surface Treatment: ZP Blacken HDG Bolt Grade: 8.8 10.9 12.9 Finish: ZP HDG Blackening Castle Nut Surface Treatment: Yellow Zinc Blue Zinc U Bolt Grade: 8.8 10.9 12.9 Finish: YZP WZP Nylon Nut ...
