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OSG Threading Tap NPT A-Spiral Flute - Powder Metal Right Hand -TiCN Coated - Blind Holes DIN5156 - 1/4 x 18
| Size | 1/4 |
| Pitch | 18 |
| Overall Length | 100 |
| Threading Length | 28 |
| Shank Diameter | 11 |
| Square | 9 |
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The OSG Threading Tap NPT A-Spiral Flute in a powder metal body is a precision internal/threading tool designed for creating 1/4-18 NPT threads in blind holes. Built for professional use, it delivers reliable, clean taps in challenging applications.
- Flute Style: A-Spiral Flute design enables efficient chip evacuation in blind holes, helping prevent clogging and reducing tap stress.
- Material: Powder Metal body delivers high toughness, wear resistance, and durability for demanding materials and repeated use.
- Coating: TiCN coating provides excellent heat resistance and lower friction, supporting faster cutting speeds and longer tool life.
- Thread Type & Size: NPT (National Pipe Taper) threading at 1/4-18, designed for precise taper threads in pipe connections.
- Application: Optimized for blind-hole tapping and aligned with DIN5156 specifications for reliable, repeatable results.
- Hand: Right-hand tapping to produce standard internal threads.
These taps empower you to achieve accurate, leak-free NPT threads in hard-to-reach blind holes, improving assembly reliability and reducing retapping needs. The spiral flute minimizes chip buildup and binding, while the TiCN coating lowers friction and dissipates heat, enabling efficient machining and extended tool life across a range of materials and applications.
| Size | 1/4 |
| Pitch | 18 |
| Overall Length | 100 |
| Threading Length | 28 |
| Shank Diameter | 11 |
| Square | 9 |
| Flutes | 3 |
| DIN | 5156 |
| Thread Direction | Right Hand |
| Substrate | Powder Metal |
| Coating | TiCN |
| Style | Spiral Flute |
| Form | NPT |
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 NPT A-Spiral Flute - Powder Metal Right Hand -TiCN Coated - Blind Holes
View full collection →You are viewing OSG-48331700. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Overall Length | Shank Diameter | Flutes | DIN | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|---|
| OSG-48331500 | 1/16 | 27 | 90 | 6 | 3 | 5156 | £129.17 | 1-2 days | |
| OSG-48331600 | 1/8 | 27 | 90 | 7 | 3 | 5156 | £103.37 | In Stock | |
| OSG-48331700 Viewing | 1/4 | 18 | 100 | 11 | 3 | 5156 | £124.30 | In Stock | |
| OSG-48331800 | 3/8 | 18 | 110 | 12 | 4 | 5156 | £170.44 | 1-2 days | |
| OSG-48331900 | 1/2 | 14 | 125 | 16 | 4 | 5156 | £212.81 | In Stock | |
| OSG-48331000 | 3/4 | 14 | 140 | 20 | 4 | 5156 | £337.00 | 1-2 days | |
| OSG-48331100 | 1 | 11.5 | 160 | 25 | 4 | 5156 | £478.28 | 1-2 days |
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