Sutton M2231270 1/2-20 UNF Hand Tap Set - Taper, Intermediate and Bottoming
Available
The Sutton M223 UNF hand tap set is a set of three straight flute hand taps in one thread size: one taper tap, one intermediate tap and one bottoming tap. It is made in 11 sizes from 1/4-28 to 1-14, so you buy the set that matches the thread you need to cut.
The taps are made from tungsten chrome alloy (TCA) with a square shank for use in a tap wrench. The straight flutes suit materials where chips break up readily, particularly through-hole tapping, and the taps are for hand use only, to a depth of up to 1.5 x diameter.
These are carbon taps for general purpose and DIY use. They are not suitable for precision, safety or critical threads. Taper taps are used when the material is difficult to work (alloy steel) and are recommended for small diameter threads. Intermediate taps help align and start the tap into an untapped hole. Bottoming taps have a continuous cutting edge with almost no taper and are usually used to cut threads to the bottom of a blind hole.
Where this set is used
- Cutting UNF (Unified National Fine) internal threads by hand in maintenance, repair and workshop jobs
- Re-threading damaged holes with a tap wrench, starting with the taper tap and finishing with the bottoming tap in blind holes
- Keeping the three leads together for a thread size you cut often
Design features
- Taper, intermediate and bottoming taps in one set (3 piece)
- Tungsten chrome alloy (TCA) construction
- Straight flutes for through-hole tapping, up to 1.5 x diameter
- Square shank for tap wrench use
- Available in 11 sizes: 1/4-28 to 1-14
Sizes available
Each size is sold as its own set of three taps. Pick the size and thread from the table or the size selector.
| Size | TPI | Major diameter (mm) | Tapping drill (mm) | Item no. |
|---|---|---|---|---|
| 1/4 UNF | 28 | 6.35 | 5.5 | M2230635 |
| 5/16 UNF | 24 | 7.9375 | 6.9 | M2230794 |
| 3/8 UNF | 24 | 9.525 | 8.5 | M2230953 |
| 7/16 UNF | 20 | 11.1125 | 9.8 | M2231111 |
| 1/2 UNF | 20 | 12.7 | 11.5 | M2231270 |
| 9/16 UNF | 18 | 14.2875 | 12.8 | M2231429 |
| 5/8 UNF | 18 | 15.875 | 14.5 | M2231588 |
| 3/4 UNF | 16 | 19.05 | 17.5 | M2231905 |
| 7/8 UNF | 14 | 22.225 | 20.5 | M2232223 |
| 1 UNF | 12 | 25.4 | 23.5 | M2232540 |
| 1 UNS | 14 | 25.4 | 24 | M2232541 |
Key specifications
| Specification | Detail |
|---|---|
| Brand | Sutton |
| Catalogue code | M223 |
| Type | Hand tap set |
| Set contents | Taper, intermediate and bottoming (3 piece) |
| Thread form | UNF (Unified National Fine) |
| Sizes | 1/4-28 to 1-14 |
| Material | Tungsten chrome alloy (TCA) |
| Flute | Straight |
| Shank | Square |
| Maximum cut depth | 1.5 x diameter |
| Use | Hand tapping; general purpose / DIY, not for precision, safety or critical threads |
Related Sutton threading products
Compare other tap sets: M219 UNC hand tap set (taper, intermediate and bottoming), M227 BSW hand tap set (taper, intermediate and bottoming), M243 BSPF hand tap set (taper, intermediate and bottoming), M500NF35 35 piece UNF tap and die set, M500NFM33 33 piece UNF / Metric tap and die set.
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Sutton M223 UNF Hand Tap Set - Taper, Intermediate and Bottoming: 1/2-20 UNF
SKU: A0011245 | Model: M2231270
Tap Size 1/2-20 UNF. 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.