Flexnuts

Superbolt was the world’s first to revolutionize nuts and bolts with multi-jackbolt tensioning technology. Since then, our technology has been proven in tens of thousands of successful installations and we continue to develop a multitude of solutions to solve the next generation of bolting challenges.

Flexnuts

Flexnuts have been specially developed for through-hole applications. Their reactive design distributes the bolt load along many threads, adds elasticity and prevents stress concentrations in the first few threads.

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.

Standard series

Flexnut type Specifications
SX8
Standard Flexnut
  • Dimension range: M20 - M160 (3/4″ - 6″)
  • Approx. bolt stress depending on size: 450 to 700 N/mm2 (60 to 100 ksi)
  • Temperature range: -10 to 250ºC (0 to 500ºF)

SX12
High-strength Flexnut

  • Dimension range: M20 - M160 (3/4″ - 6″)
  • Approx. bolt stress depending on size: 500 to 900 N/mm2 (70 to 130 ksi)
  • Temperature range: -10 to 250ºC (0 to 500ºF)

 

Advantages

  • Ensures an equal load distribution on the thread of the bolt/stud, under load
  • Adds elasticity in the joint
  • Increases the fatigue life of the bolt/stud

Succesverhalen van klanten

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