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OSG Threading Tap BSW 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 | 13 |
| Reach | 30 |
| Shank Diameter | 7 |
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The OSG Threading Tap BSW A-Spiral Flute is designed for cutting British Standard Whitworth threads in blind holes. This TiCN-coated, powder-metal tap delivers reliable, long-lasting performance for machinists working in closed-end holes.
- Thread type: British Standard Whitworth (BSW) threading for 1/4-20 blind-hole applications.
- A-Spiral Flute: Optimizes chip evacuation in blind holes to reduce binding and tool stress.
- Material: Powder-metal construction provides enhanced wear resistance and durability.
- Coating: TiCN coating lowers friction and increases hardness for higher cutting speeds and improved heat tolerance.
- Direction: Right-hand threading aligned with standard assembly practices.
- Hole type: Specifically engineered for blind holes where access to the far side is limited.
- DIN standard: Complies with DIN2184-1 for consistent tapping performance.
- Size: 1/4 x 20 BSW thread profile to match common hardware in British-standard systems.
With its spiral flute, tough powder-metal core, and TiCN coating, this OSG tap delivers cleaner, more precise threads while extending tool life in production or repair work. The design minimizes chip buildup in closed-end holes, helping you maintain consistent thread quality and reducing the need for re-tapping. For best results, use proper lubrication, select the correct drill size for a precise hole, and employ light pecking to clear chips on deeper taps.
| Size | 1/4 |
| Pitch | 20 |
| Overall Length | 80 |
| Threading Length | 13 |
| 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 | BSW |
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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 BSW A-Spiral Flute - Powder Metal Right Hand -TiCN Coated - Blind Holes
View full collection →You are viewing OSG-48139706. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Overall Length | Shank Diameter | Flutes | DIN | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|---|
| OSG-48139702 | 1/8 | 40 | 56 | 3.5 | 2 | 2184-1 | £35.93 | In Stock | |
| OSG-48139704 | 3/16 | 24 | 70 | 6 | 2 | 2184-1 | £37.53 | In Stock | |
| OSG-48139706 Viewing | 1/4 | 20 | 80 | 7 | 2 | 2184-1 | £38.33 | In Stock | |
| OSG-48139707 | 5/16 | 18 | 90 | 8 | 3 | 2184-1 | £44.46 | In Stock | |
| OSG-48139708 | 3/8 | 16 | 100 | 10 | 3 | 2184-1 | £52.70 | In Stock | |
| OSG-48139709 | 7/16 | 14 | 100 | 8 | 3 | 2184-1 | £57.10 | In Stock | |
| OSG-48139710 | 1/2 | 12 | 110 | 9 | 3 | 2184-1 | £71.73 | In Stock | |
| OSG-48139712 | 5/8 | 11 | 110 | 12 | 3 | 2184-1 | £93.61 | In Stock | |
| OSG-48139713 | 3/4 | 10 | 125 | 14 | 4 | 2184-1 | £131.65 | In Stock | |
| OSG-48139714 | 7/8 | 9 | 140 | 18 | 4 | 2184-1 | £165.05 | In Stock | |
| OSG-48139715 | 1 | 8 | 160 | 18 | 4 | 2184-1 | £231.89 | In Stock |
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