Sutton M2423325 1" x 11 BSPF Bottoming Hand Tap - Straight Flute, TCA
Available
The Sutton M242 is a BSPF (G series, British Standard Pipe Fitting) bottoming hand tap in 9 sizes, 1/8" to 2", with a straight flute and a square shank, made from Tungsten Chrome Alloy (TCA) and sold singly. It cuts internal parallel (G series) pipe threads in pipes and is suited to pipe fittings. A bottoming tap offers a continuous cutting edge with almost no taper and is usually used to cut threads to the bottom of a blind hole.
The square shank is designed for hard threading work in a variety of materials. The straight flutes suit through-hole tapping. Carbon taps are not suitable for precision, safety or critical threads. They are for general purpose and DIY use only. Applications include DIY, trade, automotive, plumbing, metalworking and MRO work.
Where this product is used
- Cutting internal parallel (G series) pipe threads in pipes and pipe fittings.
- General purpose and DIY plumbing and workshop threading where a precision thread is not required.
- Applications include DIY, trade, automotive, plumbing, metalworking and MRO work.
Design features
- Tungsten Chrome Alloy (TCA): carbon taps for general purpose use.
- Square shank: for hard threading work in a variety of materials.
- Straight flutes: suited to through-hole tapping.
- Lead: A bottoming tap offers a continuous cutting edge with almost no taper and is usually used to cut threads to the bottom of a blind hole.
Sizes and item numbers
Tap drill is the drill size to use before tapping.
| Size | TPI | Tap drill (mm) | Sutton item no. |
|---|---|---|---|
| 1/8" | 28 | 8.8 | M242 0973 |
| 1/4" | 19 | 11.8 | M242 1316 |
| 3/8" | 19 | 15.3 | M242 1666 |
| 1/2" | 14 | 19 | M242 2096 |
| 5/8" | 14 | 21 | M242 2291 |
| 3/4" | 14 | 24.5 | M242 2644 |
| 1" | 11 | 31 | M242 3325 |
| 1-1/4" | 11 | 39.5 | M242 4191 |
| 2" | 11 | 57.5 | M242 5961 |
Using the tap
- Drill the tap drill size shown in the size table for the thread you are cutting, then start the tap square to the hole.
- Turn the tap with a tap wrench on the square shank, backing off regularly to break the chip.
- Use a cutting fluid suited to the material being tapped.
- Confirm the thread standard of the mating fitting before tapping: BSP threads have a 55° thread angle and NPT a 60° thread angle, and they are not interchangeable.
- G series (BSPF) threads are parallel; Rc (BSPT) and NPT threads are taper threads. Check the fit against the mating part as you tap.
Key specifications
| Specification | Detail |
|---|---|
| Catalogue code | M242 |
| Thread form | BSPF (G series), parallel pipe thread, 55° |
| Sizes | 9 sizes, 1/8" to 2" |
| Lead | Bottoming |
| Flute | Straight flute |
| Shank | Square shank |
| Material | Tungsten Chrome Alloy (TCA) |
| Pack | Sold singly |
Related products
Related Sutton threading tools: M240 BSPF taper taps, M241 BSPF intermediate taps, M243 BSPF tap sets of 3, M244 BSPT bottoming taps, M245 NPT bottoming taps, M452 BSPF die nuts and M569 BSPF button dies. Browse threading tools and threading dies and sets, or Tap Magic cutting fluids.
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Sutton M242 BSPF Bottoming Hand Tap 1/8" to 2" - Straight Flute, Tungsten Chrome Alloy (TCA): 11 / 1
SKU: A0011451 | Model: M2423325
TPI 11, Diameter (inch) 1. Descriptions
Sutton Tools Carbon Hand Taps are ideal for routine maintenance, repair work and for rethreading where high accuracy and tolerance thread is not critical.
Straight flutes are designed for tapping into materials where chips break-up readily and present no disposal problems, particularly in through-hole tapping.
Straight flute taps are only suitable for hand operations, tapping up to 1-1/2 x diameter.