STI Tap (Screw Thread Insert Tap).
 
STI Tap (Screw Thread Insert Tap), oversize tap
 
Screw Thread Insert taps produce an oversize threaded hole to accept an insert with standard size threads.
 
Types of taps, helicoil tap:
Taper Style
Plug Style
Bottoming Style

Helicoil Wire Thread Inserts for thread reinforcement and thread repair.
Helicoil Taps differ from standard taps dimensionally. They have alarger diameter but the same pitch as a standard tap in order toaccommodate the wire thread insert.

Helicoil taps are compatible with wire thread inserts and taps from other manufacturers. 
They are often called STI or EG taps.
 
STI Taps are available in HSS material as standard and in other materials such as HSS-E.
Coated taps with TiN or desired special coatings can also be provided.
 
STI taps are also referred to as Screw Thread Insert (STI) Taps and must be used for screw thread insert repairs. l STI Taps are supplied with Thread Repair Kits and may be used with the same tap handles as conventional taps.
 
STI Taps in various types and styles to produce holes for Tolerance Classes 4H5H and 5H for use in the general range of aluminums, magnesiums, mild steels. These taps are designed and manufactured of high speed steel to the most rigid specifications.


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