Profile: Mark's Bolts Nuts & Surplus specializes in offering fasteners. Our products include US standard, metric, stainless, concrete & block and tamper proof fasteners. We also offer nuts, bolts and washers. Metric fasteners include hex bolts, socket caps, button head allens, flat head allens, socket set screws, machine screws, nylon lock nuts, cap nuts, washers, hex nuts and threaded rod. Concrete & block fasteners include anchor bolts, sleeve anchors, wedge anchors, toggle bolts, machine screws anchors, drive pin anchors and tap cons.