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OSG Threading Tap UNC A-Spiral Point - Powder Metal Right Hand -TiCN Coated - Through Holes DIN2184-1 - 1/4 x 20
| Size | 1/4 |
| Pitch | 20 |
| Overall Length | 80 |
| Threading Length | 19 |
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Description
The OSG Threading Tap UNC A-Spiral Point is a precision tool built for through-hole threading in UNC applications. Designed for durability and consistent results, this 1/4-20 tap combines a powder-metal core with a TiCN coating to deliver reliable performance in a variety of materials.
- Thread Type: UNC A (Unified National Coarse) spiral-point tap with a right-hand thread, sized for 1/4"-20 through-holes.
- Flute Design: Spiral-point geometry pushes chips forward, optimizing through-hole threading and reducing chip buildup.
- Coating: TiCN coating enhances hardness and heat resistance for longer tool life and steadier cutting performance.
- Substrate: Powder-metal construction delivers improved wear resistance and toughness in demanding applications.
- Hole Compatibility: Specifically engineered for through-hole DIN2184-1 requirements, ensuring reliable engagement and alignment.
- Performance: Supports higher cutting speeds, smoother finish, and consistent thread quality across a range of materials.
In practical use, this OSG threading tap excels in production runs and maintenance tasks that require quick, clean UNC threads in through-holes. The combination of TiCN coating and powder-metal technology helps extend tool life, minimize downtime, and deliver dependable threads the first time, every time. Ideal for shops seeking a durable, high-precision tapping solution for 1/4"-20 through-hole projects.
Part Numbers
- Protool Part Number
- OSG-48145471
- Brand
- OSG
- Category
- Threading Tap
Delivery
Free UK mainland delivery on orders over £50 ex VAT. In-stock items ordered before 4:30pm are dispatched the same working day. Full delivery information.
Returns
14-day returns on unused stock items in original packaging. Special-order and bespoke tooling is non-returnable. Read our returns policy.
Technical Support
Over 30 years of machining experience behind the counter. Call 01732 887334, Mon–Thurs 8:30–17:30, Fri 8:30–16:30.
Trade Accounts
Credit accounts, contract pricing and scheduled call-off orders available for trade customers. Apply for an account.
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 Point - Powder Metal Right Hand -TiCN Coated - Through Holes
View full collection →You are viewing OSG-48145471. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Overall Length | Shank Diameter | Flutes | DIN | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|---|
| OSG-48145453 | No.2 | 56 | 45 | 2.8 | 2 | 2184-1 | £39.39 | In Stock | |
| OSG-48145455 | No.3 | 48 | 50 | 2.8 | 2 | 2184-1 | £39.39 | In Stock | |
| OSG-48145457 | No.4 | 40 | 56 | 3.5 | 2 | 2184-1 | £35.09 | In Stock | |
| OSG-48145459 | No.5 | 40 | 56 | 3.5 | 3 | 2184-1 | £35.09 | In Stock | |
| OSG-48145461 | No.6 | 32 | 56 | 4 | 3 | 2184-1 | £33.30 | In Stock | |
| OSG-48145464 | No.8 | 32 | 63 | 4.5 | 3 | 2184-1 | £33.30 | In Stock | |
| OSG-48145466 | No.10 | 24 | 70 | 6 | 3 | 2184-1 | £35.09 | In Stock | |
| OSG-48145468 | No.12 | 24 | 80 | 6 | 3 | 2184-1 | £36.34 | In Stock | |
| OSG-48145471 Viewing | 1/4 | 20 | 80 | 7 | 3 | 2184-1 | £37.42 | In Stock | |
| OSG-48145474 | 5/16 | 18 | 90 | 8 | 3 | 2184-1 | £42.05 | In Stock | |
| OSG-48145479 | 3/8 | 16 | 100 | 10 | 3 | 2184-1 | £47.15 | In Stock | |
| OSG-48145484 | 7/16 | 14 | 100 | 8 | 3 | 2184-1 | £57.30 | In Stock | |
| OSG-48145489 | 1/2 | 13 | 110 | 9 | 3 | 2184-1 | £62.79 | In Stock | |
| OSG-48145494 | 9/16 | 12 | 110 | 11 | 3 | 2184-1 | £70.20 | In Stock | |
| OSG-48145501 | 5/8 | 11 | 110 | 12 | 3 | 2184-1 | £77.16 | In Stock | |
| OSG-48145515 | 3/4 | 10 | 125 | 14 | 3 | 2184-1 | £104.33 | In Stock | |
| OSG-48145526 | 7/8 | 9 | 140 | 18 | 3 | 2184-1 | £126.57 | In Stock | |
| OSG-48145538 | 1 | 8 | 160 | 18 | 3 | 2184-1 | £165.64 | In Stock |
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