Nut-style multi-jackbolt tensioners

Superbolt multi-jackbolt tensioners (MJTs) replace existing hex nuts. Only hand tools are required for installation and removal of any size tensioner. Safe, accurate and economical! We have a wide range of standard series, as well as an unlimited capacity to create special designs to meet your unique needs.

Superbolt products are an innovative technology for tightening large bolts & studs. MJTs have been proven and established as a preferred solution for bolting in every major industry, all over the world.

Superbolt tensioners offer you simple and cost effective tightening of large size bolts. Your joints can be tightened with high accuracy without requiring specialized skills or heavy tooling. MJTs ensures a profitable life cycle cost by improving the bolt design for OEM manufacturers, ensuring reliable operation and by facilitating maintenance procedures.


Complete solutions:
From space to deep sea, from small to large – no matter what your bolting challenge, the Nord-Lock Group has done it before. Bring your bolting questions to us, and we will work with you to find the best possible solution.

Custom Solutions:
We can find the solution to any bolting problem. With a focus on secure and reliable joints since 1982, the Nord-Lock Group has a history of thousands of special designs to prove our capabilities. We are highly adaptable to space constraints and environmental conditions that no other bolting systems can match. See pre-designed solutions and special designs section for more information.

Latest customer cases

Read more customer cases