Sutton T478 Pg 7 Straight Flute Tap Pipe Bottoming - HSS - Bright - ISO 529
Available
The Sutton T478 is a straight flute tap (bottoming chamfer) for Pg threads, made from high speed steel (HSS) with a bright finish. This listing covers 6 sizes from Pg 7 to Pg 21.
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 bottoming chamfer (Form E, 1.5 to 2 threads on the lead), for blind holes with very short thread run-out.
The tap is built to ISO 529: short machine tap construction.
Where this product is used
- Through and blind holes.
Design features
- High speed steel (HSS). Standard tool material for most common applications.
- Bright finish for general purpose applications.
- 4 flutes.
- Bottoming chamfer (Form E), for blind holes with very short thread run-out.
- 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) | d2 shank (mm) | sq square (mm) | l4 square length (mm) | Flutes |
|---|---|---|---|---|---|---|---|---|---|
| T478 1250 | Pg 7 | 20 | 11.3 | 89 | 29 | 9 | 7.1 | 10 | 4 |
| T478 1520 | Pg 9 | 18 | 13.9 | 102 | 32 | 12.5 | 10 | 12 | 4 |
| T478 1860 | Pg 11 | 18 | 17.3 | 112 | 37 | 14 | 11.2 | 14 | 4 |
| T478 2040 | Pg 13.5 | 18 | 19.1 | 118 | 38 | 16 | 12.5 | 16 | 4 |
| T478 2250 | Pg 16 | 18 | 21.2 | 118 | 38 | 16 | 12.5 | 16 | 4 |
| T478 2830 | Pg 21 | 16 | 26.8 | 138 | 48 | 20 | 16 | 20 | 4 |
Key specifications
| Specification | Detail |
|---|---|
| Catalogue code | T478 |
| Type | Straight flute tap |
| Thread series | Pg |
| Material | HSS |
| Finish | Bright |
| Chamfer | Bottoming (Form E) |
| Standard | ISO 529 |
| Flutes | 4 |
| Sizes in this listing | 6 sizes, Pg 7 to Pg 21 |
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Sutton T478 Pg Straight Flute Tap Pipe Bottoming - HSS - Bright - ISO 529: Pg7
SKU: A0015751 | Model: T4781250
This is the diameter Pg7 option of the Sutton T478 Pg Straight Flute Tap Pipe Bottoming - HSS - Bright - ISO 529. Key details for this option: thread size Pg 7, thread length 29mm, tapping drill size 11.3mm, square size 7.1mm, overall length 89mm.
Features
The Sutton T478 is a straight flute tap (bottoming chamfer) for Pg threads, made from high speed steel (HSS) with a bright finish. This listing covers 6 sizes from Pg 7 to Pg 21.
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 bottoming chamfer (Form E, 1.5 to 2 threads on the lead), for blind holes with very short thread run-out.
The tap is built to ISO 529: short machine tap construction.