Sutton T437 1/2 x 20 TPI Straight Flute Tap Left Hand Intermediate - HSS - Bright
Available
The Sutton T437 is a straight flute tap (intermediate chamfer, left hand) for UNF threads, made from high speed steel (HSS) with a bright finish. This listing covers 8 sizes from 1/4 x 28 TPI to 3/4 x 16 TPI.
Straight flutes suit through or blind holes, but they hold only a small amount of chips and do not transport them axially, so deep holes are best avoided except in short chipping materials. The tap has a intermediate chamfer (Form D, 3.5 to 5 threads on the lead), generally for through holes.
The tap is built to ISO 529: short machine tap construction.
Where this product is used
- General purpose use.
- Suitable for materials up to 1000 N/mm2.
- Through & blind holes.
- Suitable for both hand and machine operations.
- Depths up to approx. 1 x d1.
Design features
- High speed steel (HSS). Standard tool material for most common applications.
- Bright finish for general purpose applications.
- 3 to 4 flutes, depending on size.
- Intermediate chamfer (Form D), generally for through holes.
- 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 | TPI | Tapping drill (mm) | l1 overall (mm) | l2 thread (mm) | l3 (mm) | d2 shank (mm) | sq square (mm) | l4 square length (mm) | Flutes | Limit |
|---|---|---|---|---|---|---|---|---|---|---|---|
| T437 0635 | 1/4 x 28 TPI | 28 | 5.5 | 66 | 19 | 25 | 6.3 | 5 | 8 | 3 | GH3 |
| T437 0794 | 5/16 x 24 TPI | 24 | 6.9 | 72 | 22 | 30 | 8 | 6.3 | 9 | 4 | GH4 |
| T437 0953 | 3/8 x 24 TPI | 24 | 8.5 | 80 | 24 | 33 | 10 | 8 | 11 | 4 | GH4 |
| T437 1111 | 7/16 x 20 TPI | 20 | 9.8 | 85 | 25 | - | 8 | 6.3 | 9 | 4 | GH5 |
| T437 1270 | 1/2 x 20 TPI | 20 | 11.5 | 89 | 29 | - | 9 | 7.1 | 10 | 4 | GH5 |
| T437 1429 | 9/16 x 18 TPI | 18 | 12.8 | 95 | 30 | - | 11.2 | 9 | 12 | 4 | GH5 |
| T437 1588 | 5/8 x 18 TPI | 18 | 14.5 | 102 | 32 | - | 12.5 | 10 | 13 | 4 | GH5 |
| T437 1905 | 3/4 x 16 TPI | 16 | 17.5 | 112 | 37 | - | 14 | 11.2 | 14 | 4 | GH6 |
Key specifications
| Specification | Detail |
|---|---|
| Catalogue code | T437 |
| Type | Straight flute tap |
| Thread series | UNF |
| Material | HSS |
| Finish | Bright |
| Chamfer | Intermediate (Form D) |
| Standard | ISO 529 |
| Flutes | 3 to 4 |
| Sizes in this listing | 8 sizes, 1/4 x 28 TPI to 3/4 x 16 TPI |
Related products
Related Sutton taps: T436 UNF Straight Flute Tap Left Hand Taper - HSS - Bright - ISO 529, T433 UNF Straight Flute Tap Bottoming - HSS - Bright - ISO 529, T432 UNF Straight Flute Tap Intermediate - HSS - Bright - ISO 529, T431 UNF Straight Flute Tap Taper - HSS - Bright - ISO 529.
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16 / 3/4
Model Number: T4371905
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18 / 5/8
Model Number: T4371588
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18 / 9/16
Model Number: T4371429
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20 / 1/2
Model Number: T4371270
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20 / 7/16
Model Number: T4371111
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24 / 3/8
Model Number: T4370953
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24 / 5/16
Model Number: T4370794
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28 / 1/4
Model Number: T4370635
