Sutton T666 1/4 x 20 TPI Spiral Point Tap H - PM-HSS Co - TiCN - DIN 2184-1
Available
The Sutton T666 is a spiral point (gun) tap (H designation) for UNC threads, made from powder metallurgy, 8% cobalt high speed steel (PM-HSS Co) with a TiCN coating. This listing covers 7 sizes from 1/4 x 20 TPI to 3/4 x 10 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 H designation is for hard materials that form short chips, with a low rake angle and low thread relief. The chamfer is Form C (3 x P), generally for blind holes.
The thread tolerance is 2BX. The tap is built to DIN 2184-1.
Where this product is used
- Use in harder materials up to 45 HRC.
- Through holes.
- Suitable for machine operations.
- Depths up to approx. 3 x d1.
Design features
- Powder metallurgy, 8% cobalt high speed steel (PM-HSS Co). The cobalt keeps strength and hardness at very high cutting temperatures, which suits heavy duty tapping of materials up to 45 HRC.
- 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 C chamfer, 3 x P.
- Thread tolerance 2BX.
- The H designation is for hard materials that form short chips, with a low rake angle and low 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| T666 0635 | 1/4 x 20 TPI | 20 | 5.1 | 80 | 19 | 30 | 7 | 5.5 | 8 | 3 |
| T666 0794 | 5/16 x 18 TPI | 18 | 6.6 | 90 | 22 | 34 | 8 | 6.2 | 9 | 3 |
| T666 0953 | 3/8 x 16 TPI | 16 | 8 | 100 | 22 | 35 | 10 | 7 | 10 | 3 |
| T666 1111 | 7/16 x 14 TPI | 14 | 9.4 | 100 | 24 | - | 8 | 6.2 | 8 | 3 |
| T666 1270 | 1/2 x 13 TPI | 13 | 10.8 | 110 | 28 | - | 9 | 7 | 10 | 3 |
| T666 1429 | 9/16 x 12 TPI | 12 | 12.2 | 110 | 30 | - | 11 | 9 | 12 | 3 |
| T666 1905 | 3/4 x 10 TPI | 10 | 16.5 | 125 | 34 | - | 14 | 11 | 14 | 4 |
Key specifications
| Specification | Detail |
|---|---|
| Catalogue code | T666 |
| Type | Spiral point (gun) tap |
| Thread series | UNC |
| Material | PM-HSS Co |
| Finish | TiCN |
| Designation | H |
| Chamfer | Form C / 3 x P |
| Thread tolerance | 2BX |
| Standard | DIN 2184-1 |
| 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: T693 UNC Spiral Point Tap Black Magic - PM-HSSE V3 - Hardlube - DIN 2184-1, T697 UNC Spiral Point Tap VA PM - PM-HSSE V3 - TiCN - DIN 2184-1, T424 UNC Spiral Point Tap Intermediate - HSSE - TiN - ISO 529, T423 UNC Spiral Point Tap Intermediate - HSSE - Steam Oxide - ISO 529, T422 UNC Spiral Point Tap Intermediate - HSSE - Bright - ISO 529.
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Sutton T666 UNC Spiral Point Tap H - PM-HSS Co - TiCN - DIN 2184-1: 1/4"
SKU: A0015847 | Model: T6660635
Size 1/4". Sutton Spiral Point (Gun) Tap - H - PM-HSS Co - TiCN
The Sutton T666 is a spiral point (gun) tap (H designation) for UNC threads, made from powder metallurgy, 8% cobalt high speed steel (PM-HSS Co) with a TiCN coating. This listing covers 7 sizes from 1/4 x 20 TPI to 3/4 x 10 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 H designation is for hard materials that form short chips, with a low rake angle and low thread relief. The chamfer is Form C (3 x P), generally for blind holes.
The thread tolerance is 2BX. The tap is built to DIN 2184-1.