Sutton T321 M8 x 1.25 Forming Tap Multi Coolant Groove - HSSE - TiCN - DIN 2174
Available
The Sutton T321 is a forming (roll) tap with multi coolant groove for metric coarse (M) threads, made from premium grade high speed steel (HSSE) with a TiCN coating. This listing covers 7 sizes from M3 x 0.5 to M10 x 1.5.
A forming tap has no flutes and does not cut: it rolls the thread by displacing the metal, so it makes no chips and suits blind and through holes. Forming needs more machine power because of the torque involved, the rolled thread is stronger than a cut thread because the grain structure stays uniform through the thread form, and the tapping drill size differs from that of a cutting tap. The chamfer is Form D (4 x P).
The thread tolerance is 6HX. The tap is built to DIN 2174.
Where this product is used
- Suitable for materials with >10% elongation.
- Through or 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.
- TiCN coating for abrasive materials such as cast iron and aluminium alloys, and adhesive materials such as copper and copper-based alloys.
- Form D chamfer, 4 x P.
- Thread tolerance 6HX.
- DIN 2174 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 | Pitch (mm) | Tapping drill (mm) | l1 overall (mm) | l2 thread (mm) | l3 (mm) | d2 shank (mm) | sq square (mm) | l4 square length (mm) |
|---|---|---|---|---|---|---|---|---|---|
| T321 0300 | M3 x 0.5 | 0.5 | 2.8 | 56 | 11 | 18 | 3.5 | 2.7 | 6 |
| T321 0350 | M3.5 x 0.6 | 0.6 | 3.2 | 56 | 13 | 20 | 4 | 3 | 6 |
| T321 0400 | M4 x 0.7 | 0.7 | 3.7 | 63 | 13 | 21 | 4.5 | 3.4 | 6 |
| T321 0500 | M5 x 0.8 | 0.8 | 4.6 | 70 | 16 | 25 | 6 | 4.9 | 8 |
| T321 0600 | M6 x 1 | 1 | 5.5 | 80 | 19 | 30 | 6 | 4.9 | 8 |
| T321 0800 | M8 x 1.25 | 1.25 | 7.4 | 90 | 22 | 35 | 8 | 6.2 | 9 |
| T321 1000 | M10 x 1.5 | 1.5 | 9.3 | 100 | 24 | 39 | 10 | 8 | 11 |
Key specifications
| Specification | Detail |
|---|---|
| Catalogue code | T321 |
| Type | Forming (roll) tap with multi coolant groove |
| Thread series | Metric coarse (M) |
| Material | HSSE |
| Finish | TiCN |
| Designation | N |
| Chamfer | Form D / 4 x P |
| Thread tolerance | 6HX |
| Standard | DIN 2174 |
| Sizes in this listing | 7 sizes, M3 x 0.5 to M10 x 1.5 |
Related products
Related Sutton taps: T319 Metric Coarse Forming Tap Multi Coolant Groove - HSSE - TiCN - DIN 2174, T319 M1.6 x 0.35 Metric Coarse Forming Tap Multi Coolant Groove - HSSE - TiCN - DIN 2174, T320 Metric Coarse Forming Tap Multi Coolant Groove - HSSE - TiCN - DIN 2174, T322 Metric Coarse Forming Tap Multi Coolant Groove - HSSE - TiCN - DIN 2174, T323 Metric Coarse Forming Tap Multi Coolant Groove - HSSE - TiCN - DIN 2174.
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M3
Model Number: T3210300
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M3.5
Model Number: T3210350
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M4
Model Number: T3210400
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M5
Model Number: T3210500
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M6
Model Number: T3210600
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M8
Model Number: T3210800
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M10
Model Number: T3211000
