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OSG Threading Tap - UNF Spiral Point HSS-E - Steam Oxide Coated - Through Hole - 1/2 x 20
| Form | UNF |
| Size | 1/2 |
| Pitch | 20 |
| Flute Length | 29 |
| Shank Diameter | 9 |
| Overall Length | 89 |
Learn more about Klarna
The OSG UNF Spiral Point Threading Tap is a precision tool designed for through-hole tapping in metalworking projects. Built for machinists and production environments, it delivers accurate threads with durable, long-lasting performance.
- Thread Form: UNF Spiral Point threading tap for through-hole applications, optimized for clean, accurate threads
- Diameter × Pitch: 1/2" diameter with 20 Threads Per Inch (1/2-20 UNF)
- Material: HSS‑E (high-speed steel with cobalt) for increased hardness and heat resistance
- Coating: Steam oxide coating to enhance durability and corrosion resistance
- Design: Spiral point geometry promotes efficient chip evacuation and smooth thread starts
- Application: Specifically engineered for through-hole threading in a range of metals
With its cobalt-enhanced HSS-E composition and robust steam oxide finish, this tap maintains sharpness and endures higher cutting speeds. The spiral point design efficiently channels chips out of the hole, reducing re-cutting and improving thread quality. Ideal for demanding through-hole tapping tasks, it helps production environments achieve consistent results and longer tap life.
| Form | UNF |
| Size | 1/2 |
| Pitch | 20 |
| Flute Length | 29 |
| Shank Diameter | 9 |
| Overall Length | 89 |
| 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-T9547055. 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 | 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 Viewing | 1/2 | 20 | 29 | 9 | 89 | £65.34 | 1-2 days |
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