What is a Superbolt® Multi-Jackbolt Tensioner?

A "Superbolt" or "Multi-Jackbolt Tensioner" is a direct replacement for hex nuts, covered nuts, bolts, etc. They spin onto your existing bolt or stud and provide a better way to bolt up your joint. They consist of three components, shown below.

If you are tightening a nut greater than 1" in diameter, you may find Superbolt® tensioners useful, since the load you need to tighten conventional nuts and bolts exponentially increases as the size increases. Our products solve this problem and only require hand/air tools to install or remove any size tensioner. They eliminate the need for time consuming and unsafe bolting equipment such as sledgehammers, hydraulic wrenches and stud heaters.

Superbolt® Tensioners come in a variety of sizes and configurations. We have many stock items that are available for immediate shipment, and we also have a large shop and are able to handle custom jobs quickly. If you are experiencing bolting problems such as leakage, thread galling, unsafe working conditions, or are using expensive methods and find it difficult to properly bolt your joint, our products are the solution for you.

NEXT: Let's learn how they work...

• Components of MJT Tensioner

  

  1) A hardened washer protects your equipment and provides a hardened, flat surface for the jackbolts to "push" against.
  
  2) The nut body spins on your existing bolt or stud and seats against the washer hand tight (Superbolt® nut bodies are typically round).
  
  3) The Jackbolts thread through the nut body and are used to tighten the joint in pure tension, using ordinary hand tools.
  

• Bolting Made Simple

  

  Multi-Jackbolt Tensioners eliminate the need for high powered and unsafe tooling. This increases worker safety and is especially beneficial in applications with awkward locations. Our products have also reduced down time and eliminated galling problems.