Keensert high-strength threaded inserts enter in pre-threaded holes and are secured via their locking keys.
 
In High duty series they have 2 or 4 locking keys (depending from diameter) which once positioned make the insert mechanically locked against unscrewing from rotation or vibrations.
 
Keenserts are extremely robust, have high resistance to rotation and extraction, a very precise thread and are easy to install and remove. They are widely used in sectors such as mechanics or precision engineering, aeronautics and aerospace on light alloys, steel or cast iron. They can also be used in damaged threads in expensive components.
 
The Keensert inserts are supplied with the locking keys already positioned inside the grooves. The pre-positioned keys ensure that by screwing the insert it automatically positions itself at the correct installation depth.
 
Keenserts are installed using special Keenest installation tool.
 
As standard, Keenserts in HIGH duty series are supplied in:
- Standard/Free running (KNH) or Screw locking (KNHL) version
- with inch threads (UNC and UNF), from size #8-32 to 1"1/2
- with Standard tolerance (MIL tolerance is available by request)
- in Inox AISI303 or phosphated steel (Keensert Nitronic and other materials are available on request)
- in Screw locking version the Keensert inserts have a surface treatment (dry lubrication)