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OSG Threading Tap - UNF Spiral Point HSS-E - Steam Oxide Coated - Through Hole - 1/4 x 28
| Form | UNF |
| Size | 1/4 |
| Pitch | 28 |
| Flute Length | 19 |
| Shank Diameter | 6.3 |
| Overall Length | 66 |
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Achieve precise, durable threads with the OSG UNF Spiral Point Threading Tap, designed for through-hole applications and demanding machining tasks. Built for shops and professionals who value consistent fit and long tool life.
- Thread type: UNF spiral point design for efficient, accurate tapping in through-holes
- Size and pitch: 1/4" diameter, 28 threads per inch (1/4 x 28 UNF)
- Material: HSS-E (high-speed steel with cobalt) for enhanced hardness and heat resistance
- Coating: Steam Oxide coating to reduce friction and improve wear resistance
- Chip evacuation: Spiral-flute geometry facilitates continuous chip flow and minimized clogging
- Application: Specifically engineered for through-hole tapping in a range of materials
- Brand: OSG—trusted threading solutions for precision and longevity
With this tap, you can expect clean, consistent threads and reduced rework. The cobalt alloy and steam-oxide coating boost heat resistance and extend tool life even in tougher materials, while the spiral point design accelerates tapping by driving chips ahead of the thread. The through-hole compatibility ensures smooth entry and exit, helping you complete projects faster and maintain tight tolerances. Ideal for manufacturing, repair, and prototype work where dependable performance matters.
| Form | UNF |
| Size | 1/4 |
| Pitch | 28 |
| Flute Length | 19 |
| Shank Diameter | 6.3 |
| Overall Length | 66 |
| Substrate | HSS-E |
| Style | Spiral Point |
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: OSG Threading Taps - UNF Spiral Point HSS-E - Steam Oxide Coated - Through Hole
View full collection →You are viewing OSG-23104724. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Flute Length | Shank Diameter | Overall Length | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|
| OSG-23104674 | No. 10 | 32 | 16 | 5 | 58 | £37.89 | In Stock | |
| OSG-23104724 Viewing | 1/4 | 28 | 19 | 6.3 | 66 | £31.62 | In Stock | |
| OSG-23104764 | 5/16 | 24 | 22 | 8 | 72 | £35.80 | 1-2 days | |
| OSG-23104814 | 3/8 | 24 | 24 | 10 | 80 | £45.19 | 1-2 days | |
| OSG-23104814A | 7/16 | 20 | 25 | 8 | 85 | £54.61 | 1-2 days | |
| OSG-T9547055 | 1/2 | 20 | 29 | 9 | 89 | £65.34 | 1-2 days |
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