For through hole applications we have developed the Superbolt flexnut, which is a reactive nut that is able to flex elastically. Putting a Flexnut gives the same advantages as the MJT on the reactive side. Under load they flex at the bottom and at the top. This helps relieve stress concentrations and increases the fatigue life of the bolt. Since flexnuts are reactive nuts to be used opposite our tensioners, they are never torqued directly to achieve preload.
Advantages with Superbolt Flexnuts:
• Under load they ensure an equal load distribution on the thread of the bolt/stud.
• Adds elasticity in the joint.
• Increases the fatigue life of the bolt / stud.