Sutton T171 1 x 8 TPI Spiral Point Tap VA - HSSE - TiCN - DIN 2184-1
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The Sutton T171 is a spiral point (gun) tap (VA designation) for UNC threads, made from premium grade high speed steel (HSSE) with a TiCN coating. This listing covers 12 sizes from #6 x 32 TPI to 1 x 8 TPI.
The gun (spiral point) nose curls the chip forward, ahead of the tap and out of the hole, so chip clogging is avoided and coolant can flow without problems. It suits through holes. The VA designation is for stainless and tough steels, with a high rake angle and thread relief, so the chip flows continuously in an axial direction. The chamfer is Form B (4.5 x P), for through holes in medium and long chipping materials.
The thread tolerance is 2B. The tap is built to DIN 2184-1.
Where this product is used
- Use in stainless steels and high strength steels up to 1000 N/mm2.
- Through holes.
- Suitable for machine operations.
- Depths up to approx. 3 x d1.
Design features
- Premium grade high speed steel (HSSE). The vanadium grade gives high wear resistance and toughness for most tapping applications.
- TiCN coating for abrasive materials such as cast iron and aluminium alloys, and adhesive materials such as copper and copper-based alloys.
- 3 to 4 flutes, depending on size.
- Form B chamfer, 4.5 x P.
- Thread tolerance 2B.
- The VA designation is for stainless and tough steels, with a high rake angle and thread relief, so the chip flows continuously in an axial direction.
- DIN 2184-1 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| T171 0351 | #6 x 32 TPI | 32 | 2.8 | 56 | 13 | 19 | 4 | 3 | 6 | 3 |
| T171 0417 | #8 x 32 TPI | 32 | 3.4 | 63 | 13 | 19 | 4.5 | 3.4 | 6 | 3 |
| T171 0483 | #10 x 24 TPI | 24 | 3.8 | 70 | 16 | 20 | 6 | 4.9 | 8 | 3 |
| T171 0635 | 1/4 x 20 TPI | 20 | 5.1 | 80 | 19 | 30 | 7 | 5.5 | 8 | 3 |
| T171 0794 | 5/16 x 18 TPI | 18 | 6.6 | 90 | 22 | 34 | 8 | 6.2 | 9 | 3 |
| T171 0953 | 3/8 x 16 TPI | 16 | 8 | 100 | 22 | 35 | 10 | 7 | 10 | 3 |
| T171 1111 | 7/16 x 14 TPI | 14 | 9.4 | 100 | 24 | - | 8 | 6.2 | 8 | 3 |
| T171 1270 | 1/2 x 13 TPI | 13 | 10.8 | 110 | 28 | - | 9 | 7 | 10 | 3 |
| T171 1588 | 5/8 x 11 TPI | 11 | 13.5 | 110 | 32 | - | 12 | 9 | 12 | 3 |
| T171 1905 | 3/4 x 10 TPI | 10 | 16.5 | 125 | 34 | - | 14 | 11 | 14 | 4 |
| T171 2223 | 7/8 x 9 TPI | 9 | 19.5 | 140 | 34 | - | 18 | 14.5 | 17 | 4 |
| T171 2540 | 1 x 8 TPI | 8 | 22.2 | 160 | 38 | - | 18 | 14.5 | 17 | 4 |
Key specifications
| Specification | Detail |
|---|---|
| Catalogue code | T171 |
| Type | Spiral point (gun) tap |
| Thread series | UNC |
| Material | HSSE |
| Finish | TiCN |
| Designation | VA |
| Chamfer | Form B / 4.5 x P |
| Thread tolerance | 2B |
| Standard | DIN 2184-1 |
| Flutes | 3 to 4 |
| Sizes in this listing | 12 sizes, #6 x 32 TPI to 1 x 8 TPI |
Related products
Related Sutton taps: T170 UNC Spiral Point Tap VA - HSSE - Steam Oxide - DIN 2184-1, T172 UNC Spiral Point Tap H - PM-HSS Co - Steam Oxide - DIN 2184-1, T168 UNC Spiral Point Tap NH - PM-HSSE V3 - Steam Oxide - DIN 2184-1, T167 UNC Spiral Point Tap - HSSE - TiN - DIN 2184-1, T166 UNC Spiral Point Tap - HSSE - Steam Oxide - DIN 2184-1.
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Sutton T171 UNC Spiral Point Tap VA - HSSE - TiCN - DIN 2184-1: 8 / 1
SKU: A0013348 | Model: T1712540
TPI 8, Diameter (inch) 1. Features
The Sutton T171 is a spiral point (gun) tap (VA designation) for UNC threads, made from premium grade high speed steel (HSSE) with a TiCN coating. This listing covers 12 sizes from #6 x 32 TPI to 1 x 8 TPI.
The gun (spiral point) nose curls the chip forward, ahead of the tap and out of the hole, so chip clogging is avoided and coolant can flow without problems. It suits through holes. The VA designation is for stainless and tough steels, with a high rake angle and thread relief, so the chip flows continuously in an axial direction. The chamfer is Form B (4.5 x P), for through holes in medium and long chipping materials.
The thread tolerance is 2B. The tap is built to DIN 2184-1.