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OSG Threading Tap - UNC Spiral Point HSS-E - Steam Oxide Coated - Through Hole - 1/4 x 20
| Form | UNC |
| Size | 1/4 |
| Pitch | 20 |
| Flute Length | 19 |
| Shank Diameter | 6.3 |
| Overall Length | 66 |
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Precision threading tap designed for through-hole work, the OSG UNC Spiral Point Threading Tap delivers reliable, high‑quality 1/4-20 UNC threads with durable performance.
- Thread Size & Type: UNC 1/4-20 through-hole threading tap engineered for through-hole applications and consistent thread formation.
- Material: HSS‑E (high-speed steel with cobalt) for enhanced heat resistance and extended tool life in demanding machining tasks.
- Coating: Steam Oxide coating to reduce friction, improve wear resistance, and prolong tap life in production environments.
- Flute/Point Design: Spiral Point geometry promotes efficient chip evacuation and steady penetration during tapping.
- Application: Specifically optimized for through-hole tapping, supporting precise threads and reliable performance across runs.
With this tap, you gain consistent thread quality, reduced heat buildup, and longer intervals between tool changes. The combination of HSS‑E cobalt, steam oxide coating, and the spiral point design for through-hole work makes it a dependable choice for precision machining needs and production workflows.
| Form | UNC |
| Size | 1/4 |
| Pitch | 20 |
| 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 - UNC Spiral Point HSS-E - Steam Oxide Coated - Through Hole
View full collection →You are viewing OSG-23104714. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Flute Length | Shank Diameter | Overall Length | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|
| OSG-23104574 | No. 4 | 40 | 11 | 3.15 | 48 | £62.06 | 1-2 days | |
| OSG-23104594 | No. 5 | 40 | 11 | 3.15 | 48 | £62.06 | 1-2 days | |
| OSG-23104614 | No. 6 | 32 | 13 | 3.55 | 50 | £37.89 | In Stock | |
| OSG-23104644 | No. 8 | 32 | 13 | 4.5 | 53 | £37.89 | In Stock | |
| OSG-23104664 | No. 10 | 24 | 16 | 5 | 58 | £37.89 | 1-2 days | |
| OSG-23104714 Viewing | 1/4 | 20 | 19 | 6.3 | 66 | £31.62 | In Stock | |
| OSG-23104744 | 5/16 | 18 | 22 | 8 | 72 | £35.80 | In Stock | |
| OSG-23104794 | 3/8 | 16 | 24 | 10 | 80 | £45.19 | In Stock | |
| OSG-23104894 | 1/2 | 13 | 29 | 9 | 89 | £65.34 | 1-2 days |
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