HeliCoil Thread Plug Gauges & Extraction Tools

The accuracy of the finished thread when the HeliCoil insert is installed is dependent upon 
the accuracy of the tapped hole. If the finished tapped hole gauges satisfactorily, the 
installed HeliCoil insert will be within the thread tolerance. It is not necessary to gauge the 
installed insert.

After the HeliCoil insert has been installed, the GO thread plug gauge may not enter freely. 
However, the HeliCoil insert will always seat itself when the bolt or screw has been installed 
and tightened.


Types of HeliCoil Gauges

•HeliCoil Working Gauges - these gauges provide a guaranteed minimum wear allowance 
   on the pitch diameter of the GO members of .0002". 

•HeliCoil Reference Gauges - reference gauges have pitch diameters on or close to 
   minimum (basic size). They are essentially laboratory or master gauges and should be 
   used in case of conflict between 2 working gauges, which can arise due to one of them 
   having more use and wear. 

•HeliCoil Complete Gauges - complete gauges consists of the GO thread plug gauge, the 
   HI thread plug gauge and the appropriately marked gauge handle. 

Where HeliCoil inserts need to be removed from the hole after installation, they may be 
removed manually with little effort using the Emhart Technologies HeliCoil Extracting Tool. 
Removal is done by applying the extraction tool to the HeliCoil insert, giving the head of the 
tool a light blow with a hammer, and turning it counterclockwise, maintaining steady 
downward pressure.

Emhart Technologies HeliCoil Extraction Tools can be used to remove both HeliCoil Free 
Running, and HeliCoil Screw Lock Inserts. 

HeliCoil Screw Thread Inserts

HeliCoil Twinserts/Oversize Inserts

HeliCoil Pipe Thread Inserts

HeliCoil Tangless Inserts & Tools

HeliCoil Thread Repair Kits

HeliCoil Power Tools 

HeliCoil Manual Installation Tools 

HeliCoil STI Taps 

HeliCoil Gauges & Extractors 

HeliCoil Tang Break Off Tools 

HeliCoil Installation Instructions 

HeliCoil Video Presentation

Heli-Nut Inserts

Dodge Brass Inserts for Plastics

POP Blind Rivets

POP Blind Rivet Manual & 
Pneumatic Power Tools


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