Profile: DISC-LOCK International is a provider of secure, safe, durable and robust fastening solutions. The Disc-Lock safety wheel nut is a free spinning, vibration proof wheel nut, specifically designed to prevent wheel loss from commercial vehicles such as trucks, trailers and buses with Hub-Piloted wheel systems. We also have The Disc-Lock railcar fastening system consisting of a heavy hex Disc-Lock nut and a tension control bolt, which is easy to install and vibration resistant fastening system used to secure railcar safety appliances, which takes the place of the antiquated systems that require hydraulic power packs and hoses for installation and burning or cutting of the fasteners when disassembly is required. Our brands include DISC-LOCK™. We have Disc-Lock washers in standard and stainless steel, Disc-Lock locking nuts, Disc-Lock truck frame fastening system and Disc-Lock safety wheel nut.