Sutton T426 3/4 x 10 TPI Spiral Flute Tap Bottoming - HSSE - Steam Oxide - ISO 529
Available
The Sutton T426 is a spiral flute tap (R40 spiral, bottoming chamfer) for UNC threads, made from premium grade high speed steel (HSSE) with a blue steam-oxide finish. This listing covers 7 sizes from 1/4 x 20 TPI to 3/4 x 10 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.
- Blue steam-oxide finish for ferrous metals; it helps prevent chip build-up on the cutting edges and carries lubricant well.
- 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| T426 0635 | 1/4 x 20 TPI | 20 | 5.1 | 66 | 10 | 25 | 6.3 | 5 | 8 | 3 | GH4 |
| T426 0794 | 5/16 x 18 TPI | 18 | 6.6 | 72 | 13 | 30 | 8 | 6.3 | 9 | 3 | GH5 |
| T426 0953 | 3/8 x 16 TPI | 16 | 8 | 80 | 16 | 33 | 10 | 8 | 11 | 3 | GH5 |
| T426 1111 | 7/16 x 14 TPI | 14 | 9.4 | 85 | 18 | - | 8 | 6.3 | 9 | 3 | GH5 |
| T426 1270 | 1/2 x 13 TPI | 13 | 10.8 | 89 | 20 | - | 9 | 7.1 | 10 | 3 | GH6 |
| T426 1588 | 5/8 x 11 TPI | 11 | 13.5 | 102 | 20 | - | 12.5 | 10 | 13 | 3 | GH6 |
| T426 1905 | 3/4 x 10 TPI | 10 | 16.5 | 112 | 25 | - | 14 | 11.2 | 14 | 4 | GH7 |
Key specifications
| Specification | Detail |
|---|---|
| Catalogue code | T426 |
| Type | Spiral flute tap |
| Thread series | UNC |
| Material | HSSE |
| Finish | Steam Oxide |
| Spiral | R40 (40° right-hand) |
| Chamfer | Bottoming (Form E) |
| Standard | ISO 529 |
| Flutes | 3 to 4 |
| Sizes in this listing | 7 sizes, 1/4 x 20 TPI to 3/4 x 10 TPI |
Related products
Related Sutton taps: T425 UNC Spiral Flute Tap Bottoming - HSSE - Bright - ISO 529, T427 UNC Spiral Flute Tap Bottoming - HSSE - TiN - ISO 529, T273 UNC Spiral Flute Tap R40 - HSSE - TiN - DIN 2184-1, T262 UNC Spiral Flute Tap R45 VA DH - HSSE - TiCN - DIN 2184-1, T261 UNC Spiral Flute Tap R45 VA DH - HSSE - Steam Oxide - DIN 2184-1.
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Sutton T426 UNC Spiral Flute Tap Bottoming - HSSE - Steam Oxide - ISO 529: 10
SKU: A0015267 | Model: T4261905
This is the tpi 10 option of the Sutton T426 UNC Spiral Flute Tap Bottoming - HSSE - Steam Oxide - ISO 529. Key details for this option: thread length 25mm, tapping drill size 16.5mm, square size 11.2mm, shank diameter 14mm, overall length 112mm.
Features
The Sutton T426 is a spiral flute tap (R40 spiral, bottoming chamfer) for UNC threads, made from premium grade high speed steel (HSSE) with a blue steam-oxide finish. This listing covers 7 sizes from 1/4 x 20 TPI to 3/4 x 10 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.