When your project requires more than a standard fastener, the solution may be either the L9 or the PFC 9 fastening systems. The  L9 fastening systems have 180,000 PSI minimum tensile strength, which offers more hex nut thread engagement and a greater clamping force the results in lasting durability for even the toughest applications. We offer a variety of system parts in the L9 and PFC 9 series including cap screws, flat washers, hex nuts, and locknuts. Shop our full selection of L9 parts below and for small or large scale orders, request a quote to receive our best pricing available for your custom order.