We manufacture and supply Lock-Nuts according to DIN specifications and individual requirements, in sizes M4 to M110 from a variety of materials. For extreme-strain applications we recommend our FS® All-Steel Lock-Nut.

FS®-E Ultralock

FS®-E Ultralock is a mechanical principle based on an inclined plane with movable flange (wedge plate) which, combined with an all-steel safety element (prevailing torque), compensates relative movement below the lock-nut.

The release torque, resulting from the relative movement, does hereby not lead to a loosening of the nut. On the contrary. The pre-stress within the lock-nut increases and with it the connection’s breakaway torque.

In short: Breakaway Torque > Clamping Torque

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