Sutton T339 M5 x 0.8 Spiral Flute Tap Extra Length R40 - HSSE - Bright
Available
The Sutton T339 is a spiral flute tap (R40 spiral, N designation) for metric coarse (M) threads, made from premium grade high speed steel (HSSE) with a bright finish. This listing covers 5 sizes from M3 x 0.5 to M8 x 1.25.
The 40° 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 N designation is for normal, general purpose materials, with a normal rake angle and normal thread relief. The chamfer is Form C (2.5 x P), generally for blind holes.
The thread tolerance is ISO 2 / 6H.
Where this product is used
- For long reach applications.
- Suitable for materials up to 1000 N/mm2.
- Depths up to 2.5 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.
- 3 flutes.
- 40° right-hand spiral flute.
- Form C chamfer, 2.5 x P.
- Thread tolerance ISO 2 / 6H.
- The N designation is for normal, general purpose materials, with a normal rake angle and normal thread relief.
- d2 and sq in accordance to DIN376.
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) | Flutes |
|---|---|---|---|---|---|---|---|---|---|---|
| T339 0300 | M3 x 0.5 | 0.5 | 2.5 | 112 | 5 | 18 | 3.5 | 2.7 | 6 | 3 |
| T339 0400 | M4 x 0.7 | 0.7 | 3.3 | 126 | 7 | 21 | 4.5 | 3.4 | 6 | 3 |
| T339 0500 | M5 x 0.8 | 0.8 | 4.2 | 140 | 8 | 25 | 6 | 4.9 | 8 | 3 |
| T339 0600 | M6 x 1 | 1 | 5 | 160 | 10 | 30 | 6 | 4.9 | 8 | 3 |
| T339 0800 | M8 x 1.25 | 1.25 | 6.8 | 180 | 13 | 35 | 8 | 6.2 | 10 | 3 |
Key specifications
| Specification | Detail |
|---|---|
| Catalogue code | T339 |
| Type | Spiral flute tap |
| Thread series | Metric coarse (M) |
| Material | HSSE |
| Finish | Bright |
| Designation | N |
| Spiral | R40 (40° right-hand) |
| Chamfer | Form C / 2.5 x P |
| Thread tolerance | ISO 2 / 6H |
| Flutes | 3 |
| Sizes in this listing | 5 sizes, M3 x 0.5 to M8 x 1.25 |
Related products
Related Sutton taps: T340 Metric Coarse Spiral Flute Tap Extra Length R40 - HSSE - Bright, T365 Metric Coarse Spiral Flute Tap Synchro L20 - PM-HSSE V3 - TiCN, T367 Metric Coarse Spiral Flute Tap Synchro L20 IK - PM-HSSE V3 - TiCN, T369 Metric Coarse Spiral Flute Tap Synchro R45 Al - PM-HSSE V3 - CrN, T371 Metric Coarse Spiral Flute Tap Synchro R45 Al IK - PM-HSSE V3 - CrN.
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M3
Model Number: T3390300
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M4
Model Number: T3390400
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M5
Model Number: T3390500
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M6
Model Number: T3390600
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M8
Model Number: T3390800
