Set Your Threads & Verify Them
KATO STI Taps
KATO STI (Screw Thread Insert) Taps are used for general and machine operations. The standard STI tap can be used as a basic tool to create threads ideal for threaded inserts. KATO recommends that these taps are used with a CNC machine or other high-precision equipment in order to ensure a proper class of fit.
KATO offers STI Taps in four styles:
- Standard Plug (4-Thread Chamfer): Easy starting for through-holes and blind holes.
- Standard Bottoming (2-Thread Chamfer): Ideal for blind holes that are drilled to a minimum depth.
- Spiral Pointed Plug (4-Thread Chamfer): Free-cutting for use in long through-holes and in blind holes with chip clearance.
- Spiral Flute Bottoming (2-Thread Chamfer): Pulls chips out of deep or blind holes in soft materials. (Not available for metric sizes)
KATO STI Gages
KATO STI (Screw Thread Insert) Thread Plug Gages are used to check the accuracy of the tapped hole. If the tapped hole is correct, the finished thread will also be accurate when the insert is installed. It is not necessary to gage the installed insert.
Notes:
- The Working Gage "GO" member has a 0.0002 wear allowance on the pitch diameter.
- Gaging of the tapped thread is specified because a standard gage may not freely enter an installed insert. The insert will seat itself once a bolt or screw is installed and tightened. (Reference MS33537)
- KATO STI Gages comply with MIL-T-21309.
- The "GO" member checks basic pitch diameters, major diameter minimum and lead. The "HI" or "NOT-GO" member check maximum pitch diameter. The Minor diameter must be checked separately with a graduated pin set, for example.
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