Sutton T242 M16 x 2 Spiral Flute Tap R45 W - HSSE - TiN - DIN 376
Available
The Sutton T242 is a spiral flute tap (R45 spiral, W designation) for metric coarse (M) threads, made from premium grade high speed steel (HSSE) with a gold titanium nitride (TiN) coating. This listing covers 2 sizes from M16 x 2 to M20 x 2.5.
The 45° 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 W designation is for soft materials, with a very high rake angle and low thread relief for good chip flow. The chamfer is Form C (2.5 x P), generally for blind holes.
The thread tolerance is ISO 2 / 6H. The tap is built to DIN 376: reduced shank with square drive.
Where this product is used
- Suitable for use in soft materials.
- Blind holes.
- Depths up to 3 x d1.
Design features
- Premium grade high speed steel (HSSE). The vanadium grade gives high wear resistance and toughness for most tapping applications.
- Gold titanium nitride (TiN) coating for 3 to 8 times longer tool life than uncoated tools, with higher speeds and feeds.
- 4 flutes.
- 45° right-hand spiral flute.
- Form C chamfer, 2.5 x P.
- Thread tolerance ISO 2 / 6H.
- The W designation is for soft materials, with a very high rake angle and low thread relief for good chip flow.
- CrN for copper and non-ferrous materials.
- DIN 376 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 | Pitch (mm) | Tapping drill (mm) | l1 overall (mm) | l2 thread (mm) | d2 shank (mm) | sq square (mm) | l4 square length (mm) | Flutes |
|---|---|---|---|---|---|---|---|---|---|
| T242 1600 | M16 x 2 | 2 | 14 | 110 | 20 | 12 | 9 | 12 | 4 |
| T242 2000 | M20 x 2.5 | 2.5 | 17.5 | 140 | 25 | 16 | 12 | 15 | 4 |
Key specifications
| Specification | Detail |
|---|---|
| Catalogue code | T242 |
| Type | Spiral flute tap |
| Thread series | Metric coarse (M) |
| Material | HSSE |
| Finish | TiN |
| Designation | W |
| Spiral | R45 (45° right-hand) |
| Chamfer | Form C / 2.5 x P |
| Thread tolerance | ISO 2 / 6H |
| Standard | DIN 376 |
| Flutes | 4 |
| Sizes in this listing | 2 sizes, M16 x 2 to M20 x 2.5 |
Related products
Related Sutton taps: T241 Metric Coarse Spiral Flute Tap R45 W - HSSE - TiN - DIN 371, T240 Metric Coarse Spiral Flute Tap R45 Cu - HSSE - CrN - DIN 376, T239 Metric Coarse Spiral Flute Tap R45 Cu - HSSE - CrN - DIN 371, T237 Metric Coarse Spiral Flute Tap R45 W - HSSE - Steam Oxide - DIN 371, T236 Metric Coarse Spiral Flute Tap R45 W - HSSE - Plasma Nitride - DIN 376.
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M16
Model Number: T2421600
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M20
Model Number: T2422000
