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Carmex Threading Tap - Spiral Point - UNF Supercut Tap - HSS-E - 1/4 x 28
| Style | Spiral Point |
| Form | UNF |
| Size | 1/4 |
| Pitch | 28 |
| Tolerance | 2B |
| Standard | DIN 371 |
Learn more about Klarna
The Carmex Threading Tap is a precision spiral-point tap built for UNF threading in demanding materials. Designed for professional shops and technicians, it delivers reliable cuts and efficient chip control to support fast, accurate internal threads.
- Diameter and thread: 1/4" diameter with 28 threads per inch (1/4 x 28 UNF) for fine-pitch, high-precision threads.
- Material: High-speed steel with cobalt content (HSS-E) for improved heat resistance and longer tool life in tough metals.
- Cutting geometry: Spiral Point (push-geometry) to direct chips forward and minimize clogging during tapping.
- Edge technology: Supercut edge geometry designed to deliver smooth, aggressive cutting action in demanding applications.
- Chip control: Efficient chip evacuation reduces recutting and helps maintain consistent thread quality at higher speeds.
- Application: Optimized for tough materials and high-speed threading operations, making it a dependable choice for production and maintenance tasks.
The combination of HSS-E composition, spiral-point design, and Supercut edges translates to cleaner threads, fewer tool changes, and more predictable results in UNF work. Whether fabricating new parts or repairing threaded components, this tap offers durable performance and reliable ownership for automotive, manufacturing, and general machining environments.
| Style | Spiral Point |
| Form | UNF |
| Size | 1/4 |
| Pitch | 28 |
| Tolerance | 2B |
| Standard | DIN 371 |
| Reach | 30 |
| Thread Direction | Right Hand |
| Substrate | HSS-E |
| Materials | Universal |
| Shank Diameter | 7 |
| Overall Length | 80 |
| Flute Length | 18 |
| Square | 5.5 |
| Drill Diameter | 5.5 |
| Finish | XT5 |
What time are Protool open?
We are open Monday to Friday between 8:30am and 5pm.
Do you offer Free Next Day delivery?
Yes! We offer Free Next Day delivery via Royal Mail Tracked 24 on all orders over £50 ex VAT*. We also offer Free DPD Local Next Day delivery on all orders over £100 ex VAT*.
We also offer the following:
- Royal Mail Tracked 24 — £5.90 (FREE on orders over £50 ex VAT*). Order before 4:30pm for next day delivery. No signature required.
- DPD Local Next Day — £8.00 (FREE on orders over £100 ex VAT*). Standard next day delivery to UK mainland addresses.
- Royal Mail Special Delivery — £12.50. Guaranteed delivery before 1pm the next working day.
- DPD Saturday Delivery — £25.00. Must be ordered on Friday before 4pm. Pre-12pm delivery.
For delivery to Scottish Highlands & Islands, Northern Ireland, Republic of Ireland, or overseas locations, additional charges apply. Please see our delivery page for full details, or call us on 01732 887 334.
*T's & C's and exclusions apply. Please see our delivery page for more information on all our services.
Full Range: Carmex Threading Taps - Spiral Point - UNF Supercut Tap - HSS-E
View full collection →You are viewing CTPD371B025028UNF2BXT5. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Overall Length | Flute Length | Square | Drill Diameter | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|---|
| CTPD371B836UNF2BXT5 | No. 8 | 36 | 63 | 12 | 3.4 | 3.5 | £21.34 | 5 days | |
| CTPD371B1032UNF2BXT5 | No. 10 | 32 | 70 | 14 | 4.9 | 4.1 | £21.34 | 5 days | |
| CTPD371B1228UNF2BXT5 | No. 12 | 28 | 80 | 18 | 4.9 | 4.6 | £22.12 | 5 days | |
| CTPD371B025028UNF2BXT5 Viewing | 1/4 | 28 | 80 | 18 | 5.5 | 5.5 | £26.50 | 5 days | |
| CTPD371B031224UNF2BXT5 | 5/16 | 24 | 90 | 20 | 6 | 6.9 | £26.50 | 5 days | |
| CTPD371B037524UNF2BXT5 | 3/8 | 24 | 100 | 20 | 8 | 8.5 | £34.80 | 5 days | |
| CTPD374B043720UNF2BXT5 | 7/16 | 20 | 100 | 20 | 6.2 | 9.9 | £45.28 | 5 days | |
| CTPD374B050020UNF2BXT5 | 1/2 | 20 | 100 | 20 | 7 | 11.5 | £60.94 | 5 days | |
| CTPD374B056218UNF2BXT5 | 9/16 | 18 | 100 | 20 | 9 | 12.9 | £69.06 | 5 days | |
| CTPD374B062518UNF2BXT5 | 5/8 | 18 | 100 | 20 | 9 | 14.5 | £69.06 | 5 days | |
| CTPD374B075016UNF2BXT5 | 3/4 | 16 | 110 | 24 | 11 | 17.5 | £102.64 | 5 days | |
| CTPD374B087514UNF2BXT5 | 7/8 | 14 | 125 | 24 | 14.5 | 20.4 | £141.48 | 5 days | |
| CTPD374B112UNF2BXT5 | 1 | 12 | 140 | 27 | 14.5 | 23.25 | £189.28 | 5 days |
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