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High Strength Range


High Strength Range

General Description

SUPERBOLT® Flexnuts of the SX12 Series are able to flex elastically. Under load SUPERBOLT® Flexnuts flex out at the bottom and in at the top. This helps relieve stress concentrations and increases the fatigue life of the bolt. Therefore, SUPERBOLT® Flexnuts are used for applications where boltings are in danger of breaking due to fatigue.

SUPERBOLT® Flexnuts are reactive nuts only. They may not be torqued.

High strength boltings with short clamping lengths

Available upon request:

inch threads (UN and Whit)
D > M160
other sizes and specials
anti-corrosion protection
special materials

 Technical Data

property class about 10
temperatures:   –10 to +250 °C  
max. bolt stress:   approx. 500 to 900 N/mm2; depending on size
flexible up to about 900 N/mm2 
max. values valid for permanent bolting applications, incl. reaction forces