Sutton T399 M2.5 x 0.45 Forming Tap Single Coolant Groove - HSSE - Bright - ISO 529
Available
The Sutton T399 is a forming (roll) tap with single coolant groove for metric coarse (M) threads, made from premium grade high speed steel (HSSE) with a bright finish. This listing covers 9 sizes from M2.5 x 0.45 to M12 x 1.75.
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 thread tolerance is GH4 / 6H. The tap is built to ISO 529: short machine tap construction.
Where this product is used
- For cold forming of threads in materials with good flow characteristics.
- Through or blind holes.
- Depths up to approx. 1.5 x d1.
Design features
- Premium grade high speed steel (HSSE). The vanadium grade gives high wear resistance and toughness for most tapping applications.
- Bright finish for general purpose applications.
- Thread tolerance GH4 / 6H.
- TiN for longer tool life.
- ISO 529 construction, short machine tap 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) |
|---|---|---|---|---|---|---|---|---|---|
| T399 0250 | M2.5 x 0.45 | 0.45 | 2.3 | 45 | 10 | - | 2.8 | 2.24 | 5 |
| T399 0300 | M3 x 0.5 | 0.5 | 2.8 | 48 | 11 | 15 | 3.15 | 2.5 | 5 |
| T399 0350 | M3.5 x 0.6 | 0.6 | 3.2 | 50 | 13 | 17.5 | 3.55 | 2.8 | 5 |
| T399 0400 | M4 x 0.7 | 0.7 | 3.7 | 53 | 13 | 18 | 4 | 3.15 | 6 |
| T399 0500 | M5 x 0.8 | 0.8 | 4.6 | 58 | 16 | 22 | 5 | 4 | 7 |
| T399 0600 | M6 x 1 | 1 | 5.5 | 66 | 19 | 26 | 6.3 | 5 | 8 |
| T399 0800 | M8 x 1.25 | 1.25 | 7.4 | 72 | 22 | 30 | 8 | 6.3 | 9 |
| T399 1000 | M10 x 1.5 | 1.5 | 9.3 | 80 | 24 | 34 | 10 | 8 | 11 |
| T399 1200 | M12 x 1.75 | 1.75 | 11.2 | 89 | 29 | - | 9 | 7.1 | 10 |
Key specifications
| Specification | Detail |
|---|---|
| Catalogue code | T399 |
| Type | Forming (roll) tap with single coolant groove |
| Thread series | Metric coarse (M) |
| Material | HSSE |
| Finish | Bright |
| Designation | Short |
| Thread tolerance | GH4 / 6H |
| Standard | ISO 529 |
| Sizes in this listing | 9 sizes, M2.5 x 0.45 to M12 x 1.75 |
Related products
Related Sutton taps: T400 Metric Coarse Forming Tap Single Coolant Groove - HSSE - TiN - ISO 529, T383 Metric Coarse Forming Tap Synchro IK - PM-HSSE V3 - TiN, T381 Metric Coarse Forming Tap Synchro - PM-HSSE V3 - TiN, T329 Metric Coarse Forming Tap Multi Coolant Groove Cu - HSSE - CrN - DIN 2174, T328 Metric Coarse Forming Tap Multi Coolant Groove UNI IK - SPM - TiAlN - DIN 2174.
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Sutton T399 Metric Coarse Forming Tap Single Coolant Groove - HSSE - Bright - ISO 529: M2.5
SKU: A0014975 | Model: T3990250
Diameter (metric) M2.5. Features
The Sutton T399 is a forming (roll) tap with single coolant groove for metric coarse (M) threads, made from premium grade high speed steel (HSSE) with a bright finish. This listing covers 9 sizes from M2.5 x 0.45 to M12 x 1.75.
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 thread tolerance is GH4 / 6H. The tap is built to ISO 529: short machine tap construction.