Sutton T179 G 1/8 x 28 TPI Spiral Point Tap - HSSE - Steam Oxide - DIN 5156
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The Sutton T179 is a spiral point (gun) tap (N designation) for BSPF (G) threads, made from premium grade high speed steel (HSSE) with a blue steam-oxide finish. This listing covers one size: G 1/8 x 28 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 standard is ISO 228. The tap is built to DIN 5156: reduced shank with square drive.
Where this product is used
- General Purpose use in materials up to approximately 1000 N/mm2.
- Through holes.
- Suitable machine operations.
- Depths up to approximately 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.
- 3 flutes.
- Form B chamfer, 4.5 x P.
- Thread standard ISO 228.
- The N designation is for normal, general purpose materials, with a normal rake angle and normal thread relief.
- DIN 5156 construction, reduced shank with square drive.
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) | d2 shank (mm) | sq square (mm) | l4 square length (mm) | Flutes |
|---|---|---|---|---|---|---|---|---|---|
| T179 0973 | G 1/8 x 28 TPI | 28 | 8.8 | 90 | 20 | 7 | 5.5 | 8 | 3 |
Key specifications
| Specification | Detail |
|---|---|
| Catalogue code | T179 |
| Type | Spiral point (gun) tap |
| Thread series | BSPF (G) |
| Material | HSSE |
| Finish | Steam Oxide |
| Designation | N |
| Chamfer | Form B / 4.5 x P |
| Thread standard | ISO 228 |
| Standard | DIN 5156 |
| Flutes | 3 |
| Sizes in this listing | G 1/8 x 28 TPI |
Related products
Related Sutton taps: T178 BSPF (G) Spiral Point Tap - HSSE - Bright - DIN 5156, T180 BSPF (G) Spiral Point Tap - HSSE - TiN - DIN 5156, T181 BSPF (G) Spiral Point Tap VA - HSSE - Steam Oxide - DIN 5156, T349 BSPF (G) Spiral Point Tap VA PM - PM-HSSE V3 - Steam Oxide - DIN 5156, T350 BSPF (G) Spiral Point Tap VA PM - PM-HSSE V3 - TiCN - DIN 5156.
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