We are specialized in manufacture of high-strength screws, bolts, nuts and special parts. The major products list as follow: FASTENER 1. Bolt&Screw:hex/heavy hex/structural/round head square neck/carriage/flange/square/flat/hex socket etc., 2. Nut: Hex/heavy hex/structural /Jam/Square/slotted/welded/metal lock/nylon insert lock nut etc.