ThreadLoc^® mechanical
POWERLOK^® – ARNOLD's mechanical ARNOLD screw lock

ARNOLD's POWERLOK^® screws are locking screws with a trilobular^® thread. They screw into an existing metric ISO thread (tolerance range 6H). Small 30° edges are rolled on the regular 60° thread edges, and these extend beyond the nominal bolt thread diameter. When the fastener is screwed into the counter-thread (ISO 6H), these 30° tips penetrate and cause the screw to self-lock, thus creating an oscillation and vibration-resistant seat.

The deformation of the female thread caused by the 30° tips takes place in the flexible area. This ensures a high degree of self-locking and a reusability rate for the screw of up to five times into the same female thread.