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KATO STI Thread Plug Gages |
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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 inset is installed. It
is not necessary to gage the installed insert. Please note
that both "Working Gages" and "Reference Gages"
are shown tabulated. Working Gages are recommended for use
with production since their greater tolerance allows for more
wear. Reference Gages have pitch diameters at or very close to
basic sizes and are to be used as master gages.
Special 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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Nominal
Thread
Size |
Working Gages |
Reference Gages |
| 3B |
2B |
3B |
2B |
| UNC
- Unified Coarse |
| 2-56 |
CGC-02X-3B |
CGC-02X-2B |
CGC-02W-3B |
CGC-02W-2B |
| 4-40 |
CGC-04X-3B |
CGC-04X-3B |
CGC-04W-3B |
CGC-04W-2B |
| 6-32 |
CGC-06X-3B |
CGC-06X-3B |
CGC-06W-3B |
CGC-06W-2B |
| 8-32 |
CGC-2X-3B |
CGC-2X-3B |
CGC-2W-3B |
CGC-2W-2B |
| 10-24 |
CGC-3X-3B |
CGC-3X-3B |
CGC-3W-3B |
CGC-3W-2B |
| 1/4-20 |
CGC-4X-3B |
CGC-4X-3B |
CGC-4W-3B |
CGC-4W-2B |
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5/16-18 |
CGC-5X-3B |
CGC-5X-3B |
CGC-5W-3B |
CGC-5W-2B |
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3/8-16 |
CGC-6X-3B |
CGC-6X-3B |
CGC-6W-3B |
CGC-6W-2B |
| UNF
- Unified Fine |
| 10-32 |
CGF-3X-3B |
CGF-3X-2B |
CGF-3W-3B |
CGF-3W-2B |
| 1/4-28 |
CGF-4X-3B |
CGF-4X-2B |
CGF-4W-3B |
CGF-4W-2B |
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5/16-24 |
CGF-5X-3B |
CGF5X-2B |
CGF-5W-3B |
CGF-5W-2B |
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3/8-24 |
CGF-6X-3B |
CGF-6X-2B |
CGF-6W-3B |
CGF-6W-2B |
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Nominal
Thread
Size |
Working Gages |
Reference Gages |
| 4H |
5H |
4H |
5H |
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Metric
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| M2.5X0.45 |
CGM-2.5X0.45-4H |
CGM-2.5X0.45-5H |
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| M3X0.5 |
CGM-3X0.5-4H |
CGM-3X0.5-5H |
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| M4X0.7 |
CGM-4X0.7-4H |
CGM-4X0.7-5H |
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| M5X0.8 |
CGM-5X0.8-4H |
CGM-5X0.8-5H |
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| M6X1 |
CGM-6X1-4H |
CGM-6X1-5H |
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| M8X1.25 |
CGM-8X1.25-4H |
CGM-8X1.25-5H |
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| M10X1.5 |
CGM-10X1.5-4H |
CGM-10X1.5-5H |
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| M12X1.75 |
CGM-12X1.75-4H |
CGM-12X1.75-5H |
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* Items are non-stocked items, and may require special orders
with minimum requirements, and longer than average lead times.
For additional technical data on KATO STI Gages visit the Tech
Info Page.
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