Sutton T445 1 x 20 TPI Straight Flute Tap Taper - HSS - Bright - ISO 529
Available
The Sutton T445 is a straight flute tap (taper chamfer) for UNEF threads, made from high speed steel (HSS) with a bright finish. This listing covers 7 sizes from 1/4 x 32 TPI to 1 x 20 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 taper chamfer (Form A, 6 to 8 threads on the lead), for short 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.
- Taper chamfer (Form A), for short 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| T445 0635 | 1/4 x 32 TPI | 32 | 5.6 | 66 | 19 | 25 | 6.3 | 5 | 8 | 3 | GH3 |
| T445 0794 | 5/16 x 32 TPI | 32 | 7.2 | 72 | 22 | 30 | 8 | 6.3 | 9 | 4 | GH4 |
| T445 0953 | 3/8 x 32 TPI | 32 | 8.8 | 80 | 24 | 33 | 10 | 8 | 11 | 4 | GH4 |
| T445 1270 | 1/2 x 28 TPI | 28 | 11.8 | 89 | 29 | - | 9 | 7.1 | 10 | 4 | GH5 |
| T445 1588 | 5/8 x 24 TPI | 24 | 14.75 | 102 | 32 | - | 12.5 | 10 | 13 | 4 | GH5 |
| T445 1905 | 3/4 x 20 TPI | 20 | 18 | 112 | 37 | - | 14 | 11.2 | 14 | 4 | GH6 |
| T445 2540 | 1 x 20 TPI | 20 | 24.2 | 130 | 45 | - | 18 | 14 | 18 | 4 | GH7 |
Key specifications
| Specification | Detail |
|---|---|
| Catalogue code | T445 |
| Type | Straight flute tap |
| Thread series | UNEF |
| Material | HSS |
| Finish | Bright |
| Chamfer | Taper (Form A) |
| Standard | ISO 529 |
| Flutes | 3 to 4 |
| Sizes in this listing | 7 sizes, 1/4 x 32 TPI to 1 x 20 TPI |
Related products
Related Sutton taps: T446 UNEF Straight Flute Tap Intermediate - HSS - Bright - ISO 529, T447 UNEF Straight Flute Tap Bottoming - HSS - Bright - ISO 529.
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Sutton T445 UNEF Straight Flute Tap Taper - HSS - Bright - ISO 529: 18 / 1
SKU: A0015448 | Model: T4452540
TPI 18, Diameter (inch) 1. Features
The Sutton T445 is a straight flute tap (taper chamfer) for UNEF threads, made from high speed steel (HSS) with a bright finish. This listing covers 7 sizes from 1/4 x 32 TPI to 1 x 20 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 taper chamfer (Form A, 6 to 8 threads on the lead), for short through holes.
The tap is built to ISO 529: short machine tap construction.