Producing hexagonal head bolt of size M10 to M100, 1/2 to 4 inch, material standard 10.9 , 8.8, threaded standard (UNC,UNF,8UN,UNS), dimension standard ANSI B 1.1 Producing hexagonal head bolt of size M10 to M100, 1/2 to 4 inch, material standard 10.9 , 8.8, threaded standard (UNC,UNF,8UN,UNS), dimension standard ANSI B 1.1,