Sutton T166 1 x 8 TPI Spiral Point Tap - HSSE - Steam Oxide - DIN 2184-1
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The Sutton T166 is a spiral point (gun) tap (N designation) for UNC threads, made from premium grade high speed steel (HSSE) with a blue steam-oxide finish. This listing covers 18 sizes from #2 x 56 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 N designation is for normal, general purpose materials, with a normal rake angle and normal thread relief. 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
- General purpose use, materials up to approx. 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.
- Blue steam-oxide finish for ferrous metals; it helps prevent chip build-up on the cutting edges and carries lubricant well.
- 2 to 4 flutes, depending on size.
- Form B chamfer, 4.5 x P.
- Thread tolerance 2B.
- The N designation is for normal, general purpose materials, with a normal rake angle and normal thread relief.
- 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| T166 0218 | #2 x 56 TPI | 56 | 1.85 | 45 | 9 | 10 | 2.8 | 2.1 | 5 | 2 |
| T166 0251 | #3 x 48 TPI | 48 | 2.1 | 50 | 9 | 10 | 2.8 | 2.1 | 5 | 2 |
| T166 0284 | #4 x 40 TPI | 40 | 2.3 | 56 | 11 | 18 | 3.5 | 2.7 | 6 | 2 |
| T166 0318 | #5 x 40 TPI | 40 | 2.6 | 56 | 11 | 18 | 3.5 | 2.7 | 6 | 3 |
| T166 0351 | #6 x 32 TPI | 32 | 2.8 | 56 | 13 | 19 | 4 | 3 | 6 | 3 |
| T166 0417 | #8 x 32 TPI | 32 | 3.4 | 63 | 13 | 19 | 4.5 | 3.4 | 6 | 3 |
| T166 0483 | #10 x 24 TPI | 24 | 3.8 | 70 | 16 | 20 | 6 | 4.9 | 8 | 3 |
| T166 0549 | #12 x 24 TPI | 24 | 4.5 | 80 | 19 | 29 | 6 | 4.9 | 8 | 3 |
| T166 0635 | 1/4 x 20 TPI | 20 | 5.1 | 80 | 19 | 30 | 7 | 5.5 | 8 | 3 |
| T166 0794 | 5/16 x 18 TPI | 18 | 6.6 | 90 | 22 | 34 | 8 | 6.2 | 9 | 3 |
| T166 0953 | 3/8 x 16 TPI | 16 | 8 | 100 | 22 | 35 | 10 | 7 | 10 | 3 |
| T166 1111 | 7/16 x 14 TPI | 14 | 9.4 | 100 | 24 | - | 8 | 6.2 | 8 | 3 |
| T166 1270 | 1/2 x 13 TPI | 13 | 10.8 | 110 | 28 | - | 9 | 7 | 10 | 3 |
| T166 1429 | 9/16 x 12 TPI | 12 | 12.2 | 110 | 30 | - | 11 | 9 | 12 | 3 |
| T166 1588 | 5/8 x 11 TPI | 11 | 13.5 | 110 | 32 | - | 12 | 9 | 12 | 3 |
| T166 1905 | 3/4 x 10 TPI | 10 | 16.5 | 125 | 34 | - | 14 | 11 | 14 | 4 |
| T166 2223 | 7/8 x 9 TPI | 9 | 19.5 | 140 | 34 | - | 18 | 14.5 | 17 | 4 |
| T166 2540 | 1 x 8 TPI | 8 | 22.2 | 160 | 38 | - | 18 | 14.5 | 17 | 4 |
Key specifications
| Specification | Detail |
|---|---|
| Catalogue code | T166 |
| Type | Spiral point (gun) tap |
| Thread series | UNC |
| Material | HSSE |
| Finish | Steam Oxide |
| Designation | N |
| Chamfer | Form B / 4.5 x P |
| Thread tolerance | 2B |
| Standard | DIN 2184-1 |
| Flutes | 2 to 4 |
| Sizes in this listing | 18 sizes, #2 x 56 TPI to 1 x 8 TPI |
Related products
Related Sutton taps: T167 UNC Spiral Point Tap - HSSE - TiN - DIN 2184-1, T164 UNC Spiral Point Tap - HSSE - Bright - DIN 2184-1, T168 UNC Spiral Point Tap NH - PM-HSSE V3 - Steam Oxide - DIN 2184-1, T170 UNC Spiral Point Tap VA - HSSE - Steam Oxide - DIN 2184-1, T171 UNC Spiral Point Tap VA - HSSE - TiCN - DIN 2184-1.
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Sutton T166 UNC Spiral Point Tap - HSSE - Steam Oxide - DIN 2184-1: 8 / #1
SKU: A0013290 | Model: T1662540
TPI 8, Diameter (inch) #1. Features
The Sutton T166 is a spiral point (gun) tap (N designation) for UNC threads, made from premium grade high speed steel (HSSE) with a blue steam-oxide finish. This listing covers 18 sizes from #2 x 56 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 N designation is for normal, general purpose materials, with a normal rake angle and normal thread relief. 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.