A Superbolt or multi-jackbolt tensioner is a direct replacement for hex nuts, covered nuts, and bolts. They spin onto existing bolt or stud and provide a better way to bolt up the joint. Multi-jackbolt tensioners consist of a hardened washer which protects equipment and provides a hardened, flat surface for the jackbolts to “push” against. A nut body spins onto the existing bolt or stud and seats against the washer hand tight (Superbolt nut bodies are typically round). Jackbolts then thread through the nut body and are used to tighten the joint in pure tension. Mechanics then tighten the jackbolts using ordinary hand tools.
Superbolt tensioners are useful when tightening a nut greater than 1-in. diameter, and more so as the size of the nuts and bolts increase with the load needed to properly tighten them rises. Multi-jackbolt tensioners eliminate time consuming and unsafe bolting equipment such as sledgehammers, hydraulic wrenches, and stud heaters. Only simple hand tools are needed for any size tensioner.
Superbolt Tensioners come in a variety of sizes and configurations. Many stocked items are available and a large shop can quickly handle custom jobs.
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