Sutton T678 M3.5 x 0.6 Spiral Flute Tap R50 VA PM - PM-HSSE V3 - TiCN - DIN 371
Out of stock
The Sutton T678 is a spiral flute tap (R50 spiral, VA PM designation) for metric coarse (M) threads, made from powder metallurgy, vanadium grade high speed steel (PM-HSSE V3) with a TiCN coating. This listing covers 9 sizes from M2 x 0.4 to M10 x 1.5.
The 50° 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 VA PM designation is for stainless and tough steels, with the VA geometry in powder metal high speed steel. The chamfer is Form C (2.5 x P), generally for blind holes.
The thread tolerance is 6GX. The tap is built to DIN 371: reinforced shank with square drive.
Where this product is used
- Use in stainless steels and high strength steels up to 1000 N/mm2.
- Through holes.
- Suitable for synchronous tapping in machine operations.
- Depths up to approx. 3 x d1.
Design features
- Powder metallurgy, vanadium grade high speed steel (PM-HSSE V3). The very fine and uniform grain structure allows high hardness while keeping good toughness, for materials up to 40 HRC and difficult-to-machine materials such as stainless steels.
- TiCN coating for abrasive materials such as cast iron and aluminium alloys, and adhesive materials such as copper and copper-based alloys.
- 3 flutes.
- 50° right-hand spiral flute.
- Form C chamfer, 2.5 x P.
- Thread tolerance 6GX.
- The VA PM designation is for stainless and tough steels, with the VA geometry in powder metal high speed steel.
- PM-HSSE V3 offers higher edge hardness than standard VA series.
- DIN 371 construction, reinforced 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) | l3 (mm) | d2 shank (mm) | sq square (mm) | l4 square length (mm) | Flutes |
|---|---|---|---|---|---|---|---|---|---|---|
| T678 0200 | M2 x 0.4 | 0.4 | 1.6 | 45 | 8 | - | 2.8 | 2.1 | 5 | 3 |
| T678 0250 | M2.5 x 0.45 | 0.45 | 2.05 | 50 | 9 | - | 2.8 | 2.1 | 5 | 3 |
| T678 0300 | M3 x 0.5 | 0.5 | 2.5 | 56 | 5 | 18 | 3.5 | 2.7 | 6 | 3 |
| T678 0350 | M3.5 x 0.6 | 0.6 | 2.9 | 56 | 6 | 20 | 4 | 3 | 6 | 3 |
| T678 0400 | M4 x 0.7 | 0.7 | 3.3 | 63 | 7 | 21 | 4.5 | 3.4 | 6 | 3 |
| T678 0500 | M5 x 0.8 | 0.8 | 4.2 | 70 | 8 | 25 | 6 | 4.9 | 8 | 3 |
| T678 0600 | M6 x 1 | 1 | 5 | 80 | 10 | 30 | 6 | 4.9 | 8 | 3 |
| T678 0800 | M8 x 1.25 | 1.25 | 6.8 | 90 | 12.5 | 35 | 8 | 6.2 | 9 | 3 |
| T678 1000 | M10 x 1.5 | 1.5 | 8.5 | 100 | 15 | 39 | 10 | 8 | 11 | 3 |
Key specifications
| Specification | Detail |
|---|---|
| Catalogue code | T678 |
| Type | Spiral flute tap |
| Thread series | Metric coarse (M) |
| Material | PM-HSSE V3 |
| Finish | TiCN |
| Designation | VA PM |
| Spiral | R50 (50° right-hand) |
| Chamfer | Form C / 2.5 x P |
| Thread tolerance | 6GX |
| Standard | DIN 371 |
| Flutes | 3 |
| Sizes in this listing | 9 sizes, M2 x 0.4 to M10 x 1.5 |
Related products
Related Sutton taps: T205 Metric Coarse Spiral Flute Tap R50 VA PM - PM-HSSE V3 - TiCN - DIN 371, T206 Metric Coarse Spiral Flute Tap R50 VA PM - PM-HSSE V3 - TiCN - DIN 376, T676 Metric Coarse Spiral Flute Tap R50 VA PM - PM-HSSE V3 - TiCN - DIN 371, T677 Metric Coarse Spiral Flute Tap R50 VA PM - PM-HSSE V3 - TiCN - DIN 376, T679 Metric Coarse Spiral Flute Tap R50 VA PM - PM-HSSE V3 - TiCN - DIN 376.
Couldn't load pickup availability
Secure Checkout. We do not store credit card details
-
M2
Model Number: T6780200
-
M2.5
Model Number: T6780250
-
M3
Model Number: T6780300
-
M3.5
Model Number: T6780350
-
M4
Model Number: T6780400
-
M5
Model Number: T6780500
-
M6
Model Number: T6780600
-
M8
Model Number: T6780800
-
M10
Model Number: T6781000
