Sutton T443 3/4 x 16 TPI Spiral Flute Tap Bottoming - HSSE - TiN - ISO 529
Available
The Sutton T443 is a spiral flute tap (R40 spiral, bottoming chamfer) for UNF threads, made from premium grade high speed steel (HSSE) with a gold titanium nitride (TiN) coating. This listing covers 7 sizes from #10 x 32 TPI to 3/4 x 16 TPI.
The 40° right-hand spiral flute suits blind holes in long chipping materials: the high helix angle curls the chips and transports them back out of the hole. The tap cuts on reversal, so the flutes have rake on both front and back faces. The tap has a bottoming chamfer (Form E, 1.5 to 2 threads on the lead), for blind holes with very short thread run-out.
The tap is built to ISO 529: short machine tap construction.
Where this product is used
- General purpose use.
- Suitable for materials up to 1000 N/mm2.
- Blind holes.
- Depths up to approx. 2.5 x d1.
Design features
- Premium grade high speed steel (HSSE). The vanadium grade gives high wear resistance and toughness for most tapping applications.
- Gold titanium nitride (TiN) coating for 3 to 8 times longer tool life than uncoated tools, with higher speeds and feeds.
- 3 to 4 flutes, depending on size.
- 40° right-hand spiral flute.
- Bottoming chamfer (Form E), for blind holes with very short thread run-out.
- ISO 529 construction, short machine tap construction.
Sizes
Dimensions are in millimetres. Item numbers are the Sutton catalogue numbers. If you are not sure which tapping drill to use, try our tap drill size selector.
| Item no. | Thread size | TPI | Tapping drill (mm) | l1 overall (mm) | l2 thread (mm) | l3 (mm) | d2 shank (mm) | sq square (mm) | l4 square length (mm) | Flutes | Limit |
|---|---|---|---|---|---|---|---|---|---|---|---|
| T443 0483 | #10 x 32 TPI | 32 | 4.1 | 58 | 11 | 22 | 5 | 4 | 7 | 3 | GH3 |
| T443 0635 | 1/4 x 28 TPI | 28 | 5.5 | 66 | 10 | 25 | 6.3 | 5 | 8 | 3 | GH3 |
| T443 0794 | 5/16 x 24 TPI | 24 | 6.9 | 72 | 13 | 30 | 8 | 6.3 | 9 | 3 | GH4 |
| T443 0953 | 3/8 x 24 TPI | 24 | 8.5 | 80 | 16 | 33 | 10 | 8 | 11 | 3 | GH4 |
| T443 1270 | 1/2 x 20 TPI | 20 | 11.5 | 89 | 20 | - | 9 | 7.1 | 10 | 3 | GH5 |
| T443 1588 | 5/8 x 18 TPI | 18 | 12.8 | 102 | 20 | - | 12.5 | 10 | 13 | 3 | GH5 |
| T443 1905 | 3/4 x 16 TPI | 16 | 17.5 | 112 | 25 | - | 14 | 11.2 | 14 | 4 | GH6 |
Key specifications
| Specification | Detail |
|---|---|
| Catalogue code | T443 |
| Type | Spiral flute tap |
| Thread series | UNF |
| Material | HSSE |
| Finish | TiN |
| Spiral | R40 (40° right-hand) |
| Chamfer | Bottoming (Form E) |
| Standard | ISO 529 |
| Flutes | 3 to 4 |
| Sizes in this listing | 7 sizes, #10 x 32 TPI to 3/4 x 16 TPI |
Related products
Related Sutton taps: T442 UNF Spiral Flute Tap Bottoming - HSSE - Bright - ISO 529, T277 UNF Spiral Flute Tap R45 VA DH - HSSE - TiCN - DIN 2184-1, T276 UNF Spiral Flute Tap R45 VA DH - HSSE - Steam Oxide - DIN 2184-1, T275 UNF Spiral Flute Tap R40 - HSSE - Bright - DIN 2184-1, T692 UNF Spiral Flute Tap R50 Black Magic - PM-HSSE V3 - Hardlube - DIN 2184-1.
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16 / 3/4
Model Number: T4431905
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18 / 5/8
Model Number: T4431588
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20 / 1/2
Model Number: T4431270
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24 / 3/8
Model Number: T4430953
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24 / 5/16
Model Number: T4430794
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28 / 1/4
Model Number: T4430635
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32 / #10
Model Number: T4430483
