Valley Forge & Bolt Mfg. Co. is a domestic manufacturer of fasteners supplying the mining industry for over 50 years. We have developed patented technologies that will completely change your way of thinking about a bolted joint. Our line of mill fasteners include the Ridgeback®, Sealing Ridgeback®, and regular liner bolts. We also have load indicating fasteners that track bolt load data visually with our Maxbolt™, electronically with our SPC4® fasteners or remote/wirelessly with our SPC4® 720R meter series.