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KATO STI Taps |
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KATO STI (Screw Thread
Insert) Taps are used for general and machine
operations.
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)
Special Notes:
- The "H" limit number
(last digit in the Part Numbers below) indicates the number of
0.0005 inch increments the tap's maximum diameter is above the
basic (minimum)
- The Class of Fit specifies the
pitch diameter tolerance of the tapped hole, with 3B (4H for
metric) being the tighter range usually specified in military
& aerospace applications, and when consistent locking torque
is desired when using KATO locking CoilThread Inserts.
Class 2B (5H for metric) taps provide a broader tolerance range
or looser fit, and are normally specified in commercial &
industrial applications. The class of fit of the installed
insert is controlled by the class of fit of the tap.
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Nominal
Thread Size
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Standard Regular Finishing
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| Plug |
Bottoming |
| 3B |
2B |
3B |
2B |
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UNC - UNIFIED COARSE
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| 2-56 |
CTC-02SRP-H1 |
CTC-02SRP-H2 |
CTC-02SRB-H1 |
CTC-02SRB-H2 |
| 4-40 |
CTC-04SRP-H1 |
CTC-04SRP-H2 |
CTC-04SRB-H1 |
CTC-04SRB-H2 |
| 6-32 |
CTC-06SRP-H2 |
CTC-06SRP-H3 |
CTC-06SRB-H2 |
CTC-06SRB-H3 |
| 8-32 |
CTC-2SRP-H2 |
CTC-2SRP-H3 |
CTC-2SRB-H2 |
CTC-2SRB-H3 |
| 10-24 |
CTC-3SRP-H2 |
CTC-3SRP-H3 |
CTC-3SRB-H2 |
CTC-3SRB-H3 |
| 1/4-20 |
CTC-4SRP-H2 |
CTC-4SRP-H3 |
CTC-4SRB-H2 |
CTC-4SRB-H3 |
| 5/16-18 |
CTC-5SRP-H2 |
CTC-5SRP-H3 |
CTC-5SRB-H2 |
CTC-5SRB-H3 |
| 3/8-16 |
CTC-6SRP-H3 |
CTC-6SRP-H4 |
CTC-6SRB-H3 |
CTC-6SRB-H4 |
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UNF - UNIFIED FINE
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| 10-32 |
CTF-3SRP-H2 |
CTF-3SRP-H3 |
CTF-3SRB-H2 |
CTF-3SRB-H3 |
| 1/4-28 |
CTF-4SRP-H2 |
CTF-4SRP-H3 |
CTF-4SRB-H2 |
CTF-4SRB-H3 |
| 5/16-24 |
CTF-5SRP-H2 |
CTF-5SRP-H3 |
CTF-5SRB-H2 |
CTF-5SRB-H3 |
| 3/8-24 |
CTF-6SRP-H2 |
CTF-6SRP-H3 |
CTF-6SRB-H2 |
CTF-6SRB-H3 |
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| Nominal
Thread Size |
Spiral Pointed |
Spiral Flute |
| Plug |
Bottoming |
| 3B |
2B |
3B |
2B |
| UNC
- UNIFIED COARSE |
| 2-56 |
CTC-02SPP-H1 |
CTC-02SPP-H2 |
CTC-02SFB-H1 |
CTC-02SFB-H2 |
| 4-40 |
CTC-04SPP-H1 |
CTC-04SPP-H2 |
CTC-04SFB-H1 |
CTC-04SFB-H2 |
| 6-32 |
CTC-06SPP-H2 |
CTC-06SPP-H3 |
CTC-06SFB-H2 |
CTC-06SFB-H3 |
| 8-32 |
CTC-2SPP-H2 |
CTC-2SPP-H3 |
CTC-2SFB-H2 |
CTC-2SFB-H3 |
| 10-24 |
CTC-3SPP-H2 |
CTC-3SPP-H3 |
CTC-3SFB-H2 |
CTC-3SFB-H3 |
| 1/4-20 |
CTC-4SPP-H2 |
CTC-4SPP-H3 |
CTC-4SFB-H2 |
CTC-4SFB-H3 |
| 5/16-18 |
CTC-5SPP-H2 |
CTC-5SPP-H3 |
CTC-5SFB-H2 |
CTC-5SFB-H3 |
| 3/8-16 |
CTC-6SPP-H3 |
CTC-6SPP-H4 |
CTC-6SFB-H3 |
CTC-6SFB-H4 |
| UNF
- UNIFIED FINE |
| 10-32 |
CTF-3SPP-H2 |
CTF-3SPP-H3 |
CTF-3SFB-H2 |
CTF-3SFB-H3 |
| 1/4-28 |
CTF-4SPP-H2 |
CTF-4SPP-H3 |
CTF-4SFB-H2 |
CTF-4SFB-H3 |
| 5/16-24 |
CTF-5SPP-H2 |
CTF-5SPP-H3 |
CTF-5SFB-H2 |
CTF-5SFB-H3 |
| 3/8-24 |
CTF-6SPP-H2 |
CTF-6SPP-H3 |
CTF-6SFB-H2 |
CTF-6SFB-H3 |
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| Nominal
Thread Size |
Standard
Regular Finishing |
| Plug |
Bottoming |
| 4H |
5H |
4H |
5H |
| METRIC
COARSE |
| M2.5X0.45 |
CTM-2.5X.45SRP-4H |
CTM-2.5X.45SRP-5H |
CTM-2.5X.45SRB-4H |
CTM-2.5X.45SRB-5H |
| M3X0.5 |
CTM-3X.5SRP-4H |
CTM-3X.5SRP-5H |
CTM-3X.5SRB-4H |
CTM-3X.5SRB-5H |
| M4X0.7 |
CTM-4X.7SRP-4H |
CTM-4X.7SRP-5H |
CTM-4X.7SRB-4H |
CTM-4X.7SRB-5H |
| M5X0.8 |
CTM-5X.8SRP-4H |
CTM-5X.8SRP-5H |
CTM-5X.8SRB-4H |
CTM-5X.8SRB-5H |
| M6X1 |
CTM-6X1SRP-4H |
CTM-6X1SRP-5H |
CTM-6X1SRB-4H |
CTM-6X1SRB-5H |
| M8X1.25 |
CTM-8X1.25SRP-4H |
CTM-8X1.25SRP-5H |
CTM-8X1.25SRB-4H |
CTM-8X1.25SRB-5H |
| M10X1.5 |
CTM-10X1.5SRP-4H |
CTM-10X1.5SRP-5H |
CTM-10X1.5SRB-4H |
CTM-10X1.5SRB-5H |
| M12X1.75 |
CTM-12X1.75SRP-4H |
CTM-12X1.75SRP-5H |
CTM-12X1.75SRB-4H |
CTM-12X1.75SRB-5H |
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| Nominal
Thread Size |
Spiral
Pointed |
Spiral
Flute |
| Plug |
Bottoming |
| 4H |
5H |
4H |
5H |
| METRIC
COARSE |
| M2.5X0.45 |
CTM-2.5X.45SPP-4H |
CTM-2.5X.45SPP-5H |
N/A |
N/A |
| M3X0.5 |
CTM-3X.5SPP-4H |
CTM-3X.5SPP-5H |
N/A |
N/A |
| M4X0.7 |
CTM-4X.7SPP-4H |
CTM-4X.7SPP-5H |
N/A |
N/A |
| M5X0.8 |
CTM-5X.8SPP-4H |
CTM-5X.8SPP-5H |
N/A |
N/A |
| M6X1 |
CTM-6X1SPP-4H |
CTM-6X1SPP-5H |
N/A |
N/A |
| M8X1.25 |
CTM-8X1.25SPP-4H |
CTM-8X1.25SPP-5H |
N/A |
N/A |
| M10X1.5 |
CTM-10X1.5SPP-4H |
CTM-10X1.5SPP-5H |
N/A |
N/A |
| M12X1.75 |
CTM-12X1.75SPP-4H |
CTM-12X1.75SPP-5H |
N/A |
N/A |
* 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 Taps click
here.
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