Avdelok® Lockbolts are two-piece assemblies that require access from both sides of the workspace to be installed. They consist of a bolt and a collar. The bolt has a breaknotch much like a breakstem rivet, which makes it a single grip fastener. They are designed to provide higher shear strength, tensile strength, clamp load and vibration resistance than other products. Avdelok® assemblies are available in an assortment of styles that can be paired into a combination that best fits your application.