Hex socket cap bolt
Standard:DIN912, ANSI B18.2.1
Dia.: M12-M100; 1/2" ~ 4"
Length:20mm-1000mm; 3/4"-40"
Metarial/Grade: class8.8, class10.9, class12.9; grade5, grade8
Surface treatment:  plain ,black oxygenation, zinc plated, hot dip galvanizing, etc.