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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 |
Learn more about Klarna
The OSG UNC Spiral Point Threading Tap is engineered for machinists who need fast, accurate through-hole threading. Built from cobalt-enhanced HSS-E and finished with a Steam Oxide coating, it delivers long-lasting durability and reliable performance in demanding metal-cutting tasks.
- Size and thread: 1/4" diameter, 20 TPI (1/4-20 UNC) for standard through-hole threading.
- Material: High-speed steel with cobalt (HSS-E) for superior hardness and heat resistance.
- Coating: Steam oxide coating to reduce wear, improve lubricity, and extend tool life.
- Geometry: UNC spiral-point design that pushes chips forward for efficient cutting in through-holes.
- Through-hole design: Flutes extend to the tip to ensure reliable cutting and chip evacuation in through-hole applications.
- Durability: Built for extended tool life in demanding, high-usage machining environments.
This tap delivers precise, consistent thread quality while minimizing downtime. The spiral-point geometry enhances chip evacuation, helping prevent clogging in through-holes, and the cobalt-infused HSS-E maintains sharpness under heat. The Steam Oxide coating adds wear resistance and lubricity, supporting smoother taps and longer service between changes in busy shops.
| 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-22104714. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Flute Length | Shank Diameter | Overall Length | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|
| OSG-22104514 | No. 1 | 64 | 8 | 2.5 | 41 | £71.26 | In Stock | |
| OSG-22104534 | No. 2 | 56 | 9.5 | 2.8 | 44.5 | £50.39 | In Stock | |
| OSG-22104554 | No. 3 | 48 | 9.5 | 2.8 | 44.5 | £50.39 | In Stock | |
| OSG-22104574 | No. 4 | 40 | 11 | 3.15 | 48 | £31.02 | In Stock | |
| OSG-22104594 | No. 5 | 40 | 11 | 3.15 | 48 | £31.02 | 1-2 days | |
| OSG-22104614 | No. 6 | 32 | 13 | 3.55 | 50 | £18.94 | In Stock | |
| OSG-22104644 | No. 8 | 32 | 13 | 4.5 | 53 | £18.94 | In Stock | |
| OSG-22104664 | No. 10 | 24 | 16 | 5 | 58 | £18.94 | In Stock | |
| OSG-22104684 | No. 12 | 24 | 17 | 5.6 | 62 | £22.59 | 1-2 days | |
| OSG-22104714 Viewing | 1/4 | 20 | 19 | 6.3 | 66 | £15.81 | In Stock | |
| OSG-22104744 | 5/16 | 18 | 22 | 8 | 72 | £17.88 | In Stock | |
| OSG-22104794 | 3/8 | 16 | 24 | 10 | 80 | £22.59 | In Stock | |
| OSG-22104844 | 7/16 | 14 | 25 | 8 | 85 | £32.50 | In Stock | |
| OSG-22104894 | 1/2 | 13 | 29 | 9 | 89 | £32.66 | In Stock | |
| OSG-22104944 | 9/16 | 12 | 30 | 11.2 | 95 | £41.36 | In Stock | |
| OSG-22105014 | 5/8 | 11 | 32 | 12.5 | 102 | £48.49 | In Stock | |
| OSG-22105154 | 3/4 | 10 | 37 | 14 | 112 | £72.75 | In Stock | |
| OSG-22105264 | 7/8 | 9 | 38 | 16 | 118 | £100.83 | In Stock | |
| OSG-22105384 | 1 | 8 | 45 | 18 | 130 | £120.78 | In Stock | |
| OSG-22105514 | 1.1/8 | 7 | 48 | 20 | 138 | £208.59 | In Stock | |
| OSG-22105644 | 1.1/4 | 7 | 51 | 22.4 | 151 | £267.69 | In Stock |
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