Sutton T284 G 3/4 x 14 TPI Spiral Flute Tap R45 VA - HSSE - Steam Oxide - DIN 5156
Available
The Sutton T284 is a spiral flute tap (R45 spiral, VA designation) for BSPF (G) threads, made from premium grade high speed steel (HSSE) with a blue steam-oxide finish. This listing covers 8 sizes from G 1/8 x 28 TPI to G 1 x 11 TPI.
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 VA designation is for stainless and tough steels, with a high rake angle and thread relief, so the chip flows continuously in an axial direction. The chamfer is Form C (2.5 x P), generally for blind holes.
The thread standard is ISO 228. The tap is built to DIN 5156: reduced shank with square drive.
Where this product is used
- Use in stainless steels and high strength steels up to 1000 N/mm2.
- Blind holes.
- Suitable for synchronous tapping in machine operations.
- Depths up to approx. 3 x d1.
Design features
- Premium grade high speed steel (HSSE). The vanadium grade gives high wear resistance and toughness for most tapping applications.
- Blue steam-oxide finish for ferrous metals; it helps prevent chip build-up on the cutting edges and carries lubricant well.
- 4 to 5 flutes, depending on size.
- 45° right-hand spiral flute.
- Form C chamfer, 2.5 x P.
- Thread standard ISO 228.
- The VA designation is for stainless and tough steels, with a high rake angle and thread relief, so the chip flows continuously in an axial direction.
- DIN 5156 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 | TPI | Tapping drill (mm) | l1 overall (mm) | l2 thread (mm) | d2 shank (mm) | sq square (mm) | l4 square length (mm) | Flutes |
|---|---|---|---|---|---|---|---|---|---|
| T284 0973 | G 1/8 x 28 TPI | 28 | 8.8 | 90 | 20 | 7 | 5.5 | 8 | 4 |
| T284 1316 | G 1/4 x 19 TPI | 19 | 11.8 | 100 | 22 | 11 | 9 | 12 | 4 |
| T284 1666 | G 3/8 x 19 TPI | 19 | 15.3 | 100 | 22 | 12 | 9 | 12 | 5 |
| T284 2096 | G 1/2 x 14 TPI | 14 | 19 | 125 | 25 | 16 | 12 | 15 | 5 |
| T284 2291 | G 5/8 x 14 TPI | 14 | 21 | 125 | 25 | 18 | 14.5 | 17 | 5 |
| T284 2644 | G 3/4 x 14 TPI | 14 | 24.5 | 140 | 28 | 20 | 16 | 19 | 5 |
| T284 3020 | G 7/8 x 14 TPI | 14 | 28.5 | 150 | 28 | 22 | 18 | 21 | 5 |
| T284 3325 | G 1 x 11 TPI | 11 | 31 | 160 | 30 | 25 | 20 | 23 | 5 |
Key specifications
| Specification | Detail |
|---|---|
| Catalogue code | T284 |
| Type | Spiral flute tap |
| Thread series | BSPF (G) |
| Material | HSSE |
| Finish | Steam Oxide |
| Designation | VA |
| Spiral | R45 (45° right-hand) |
| Chamfer | Form C / 2.5 x P |
| Thread standard | ISO 228 |
| Standard | DIN 5156 |
| Flutes | 4 to 5 |
| Sizes in this listing | 8 sizes, G 1/8 x 28 TPI to G 1 x 11 TPI |
Related products
Related Sutton taps: T285 BSPF (G) Spiral Flute Tap R45 VA - HSSE - TiCN - DIN 5156, T282 BSPF (G) Spiral Flute Tap R40 - HSSE - Steam Oxide - DIN 5156, T281 BSPF (G) Spiral Flute Tap R40 - HSSE - Bright - DIN 5156, T279 BSPF (G) Spiral Flute Tap R15 - HSSE - TiN - DIN 5156, T278 BSPF (G) Spiral Flute Tap R15 - HSSE - Bright - DIN 5156.
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G1
Model Number: T2843325
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G1/2
Model Number: T2842096
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G1/4
Model Number: T2841316
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G1/8
Model Number: T2840973
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G3/4
Model Number: T2842644
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G3/8
Model Number: T2841666
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G5/8
Model Number: T2842291
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G7/8
Model Number: T2843020
