Please log in here to access all benefits, including promotional discounts and faster checkouts.
OSG Threading Tap UNC A-Spiral Flute - Powder Metal Right Hand -TiCN Coated - Blind Holes DIN2184-1 - 1/4 x 20
| Size | 1/4 |
| Pitch | 20 |
| Overall Length | 80 |
| Threading Length | 10.2 |
| Reach | 30 |
| Shank Diameter | 7 |
Learn more about Klarna
The OSG UNC A-Spiral Flute Threading Tap is a high-performance tool designed for precision UNC thread tapping in blind holes. Built for machinists and manufacturing environments, it delivers durability and clean threads in demanding applications.
- Size & Thread: 1/4" nominal diameter, 1/4-20 UNC right-hand thread for standard fasteners.
- Material: Powder metal body provides enhanced strength and wear resistance for repeated use.
- Coating: TiCN coating increases hardness and reduces friction to extend tool life and improve cutting performance.
- Flute Design: A-Spiral flute promotes efficient chip evacuation in blind holes, reducing clogging and harnessing smoother cuts.
- Application: Specifically engineered for blind-hole tapping to deliver consistent thread quality and reliable performance.
- Standards: DIN 2184-1 compatible construction to align with common industrial tapping practices.
With this tap, you can achieve clean, accurate UNC threads in blind holes while maximizing tool life. The spiral flute design aids chip removal, lowering the risk of binding in deep or recessed pockets. The TiCN coating minimizes wear and friction, supporting higher-speed tapping and greater precision, which translates to fewer reworks and more efficient production runs.
| Size | 1/4 |
| Pitch | 20 |
| Overall Length | 80 |
| Threading Length | 10.2 |
| Reach | 30 |
| Shank Diameter | 7 |
| Square | 5.5 |
| Flutes | 2 |
| DIN | 2184-1 |
| Thread Direction | Right Hand |
| Substrate | Powder Metal |
| Coating | TiCN |
| Style | Spiral Flute |
| Form | UNC |
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 A-Spiral Flute - Powder Metal Right Hand -TiCN Coated - Blind Holes
View full collection →You are viewing OSG-48139471. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Overall Length | Shank Diameter | Flutes | DIN | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|---|
| OSG-48139453 | M2 | 56 | 45 | 2.8 | 2 | 2184-1 | £48.06 | In Stock | |
| OSG-48139455 | M3 | 48 | 50 | 2.8 | 2 | 2184-1 | £47.90 | In Stock | |
| OSG-48139457 | M4 | 40 | 56 | 3.5 | 2 | 2184-1 | £42.63 | In Stock | |
| OSG-48139459 | M5 | 40 | 56 | 3.5 | 2 | 2184-1 | £42.63 | In Stock | |
| OSG-48139461 | M6 | 32 | 56 | 4 | 2 | 2184-1 | £40.45 | In Stock | |
| OSG-48139464 | M8 | 32 | 63 | 4.5 | 2 | 2184-1 | £40.45 | In Stock | |
| OSG-48139466 | M10 | 24 | 70 | 6 | 2 | 2184-1 | £42.63 | In Stock | |
| OSG-48139468 | M12 | 24 | 80 | 6 | 2 | 2184-1 | £44.21 | In Stock | |
| OSG-48139471 Viewing | 1/4 | 20 | 80 | 7 | 2 | 2184-1 | £47.03 | In Stock | |
| OSG-48139474 | 5/16 | 18 | 90 | 8 | 3 | 2184-1 | £49.35 | In Stock | |
| OSG-48139479 | 3/8 | 16 | 100 | 10 | 3 | 2184-1 | £54.40 | In Stock | |
| OSG-48139484 | 7/16 | 14 | 100 | 8 | 3 | 2184-1 | £71.85 | In Stock | |
| OSG-48139489 | 1/2 | 13 | 110 | 9 | 3 | 2184-1 | £74.16 | In Stock | |
| OSG-48139494 | 9/16 | 12 | 110 | 11 | 3 | 2184-1 | £74.29 | In Stock | |
| OSG-48139501 | 5/8 | 11 | 110 | 12 | 3 | 2184-1 | £99.28 | In Stock | |
| OSG-48139515 | 3/4 | 10 | 125 | 14 | 4 | 2184-1 | £122.97 | In Stock | |
| OSG-48139526 | 7/8 | 9 | 140 | 18 | 4 | 2184-1 | £155.76 | In Stock | |
| OSG-48139538 | 1 | 8 | 160 | 48 | 4 | 2184-1 | £206.63 | In Stock |
No products match your filters.
