Profile: Trihex Mfg., Inc. is a manufacturer of screw machine products. Our product line includes bolts, nuts, rivets & washers, sheet metal screws, tapping screws, wood screws, drywall screws, captive screws, locking screws and thread rolling screws. We also offer flathead screws, weld screws, thumb screws, shoulder screws, socket screw, cap screws, anchor screws, drive screws, machine screws and set screws.