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Keenserts are key locking threaded  inserts for OEM and thread repair that provide positive mechanical locking into the parent material by means of external “keys” that are knocked down into the host metal.

Key Locking Threaded Inserts kee n sert

Key locking inserts such as Keenserts have standard ISO Metric, UNC or UNF external threads. This means that Keensert inserts don’t need special tooling. They are simply installed using standard drills and taps.

Key Locking Miniature Inserts are available in UNC sizes  #2-56;  #4-40;  #6-32  &  #8-32 and in METRIC sizes M2x0.4;  M2.5×0.45;  M3x 0.5  &  M4x0.7.  They can come with either “free running” or “locking” internal threads in most size.

Key Locking Threaded Inserts3
Key Locking Threaded Inserts1

Keensert Lightweight Inserts  Come in sizes from 5mm to 12mm and #10 to 1/2″ UNC and UNF and have a relatively thin wall.

Keensert Heavy Duty Inserts come in sizes from 4mm to 24mm and in UNC from #8-32 to 1-1/2″ or in UNF from #10-32 to 1″. They have a thicker wall than the Lightweight series.

Key Locking Threaded Inserts
Key Locking Threaded Inserts2

Keensert Extra Heavy Duty Inserts  come in UNC and UNF sizes from #6- to 1″. They have a thicker wall than “Heavy Duty” but are not available in Metric.

Keensert Fitting Tool – Key locking inserts can be fitted by hand using a hammer as the only tool. A fitting tool is optional and the main advantage of using it is that it prevents the pins from bending over and misaligning during the final operation to knock them down into the parent material.

NOTE: Keensert inserts are generally supplied as Industrial Spec. grade but can be supplied in Milspec grade and with Certificates of Conformity on particular order

How to Fit a Key Locking Insert

Drill the hole with the specified drill size1
Drill the hole with the specified drill size
Drill the hole with the specified drill size2
Tap the hole with the correct size standard tap
Screw the insert in with fingers or a fitting tool till just below the surface.
Tap the locking pins down with a hammer, using a fitting tool if available.
Key Locking Insert fitted and in place.