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OSG Threading Tap - NPT Spiral Point HSS-E - Steam Oxide Coated - Through Hole - 1/2 x 14
| Form | NPT |
| Size | 1/2 |
| Pitch | 14 |
| Flute Length | 1.3/8 |
| Shank Diameter | 0.687 |
| Overall Length | 3.1/8 |
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Engineered for through-hole pipe-threading, the OSG NPT Spiral Point Threading Tap combines cobalt-enhanced HSS-E durability with a steam oxide finish to deliver precise, repeatable 1/2 x 14 NPT threads.
- Material: HSS-E (high-speed steel with cobalt) for increased hardness and wear resistance.
- Coating: Steam oxide coating provides improved heat resistance and lubricity during tapping.
- Design: Spiral point geometry promotes swift chip evacuation, reducing built-up material in through-hole tapping.
- Through-Hole Capability: Optimized for through-hole applications to produce clean, accurate NPT threads.
- Size: 1/2 x 14 NPT threading specification for standard pipe fittings.
- Brand Engineering: Precision-crafted by OSG for consistent performance and long tool life.
This tap is ideal for machinists and shops performing pipe-threading in through-hold metalwork. The combination of HSS-E with cobalt, along with the steam oxide coating, helps achieve reliable thread quality under demanding cutting conditions while offering extended tool life. Its spiral point design specifically addresses chip control, enabling smoother operation and reduced cycle times for through-hole NPT tasks.
| Form | NPT |
| Size | 1/2 |
| Pitch | 14 |
| Flute Length | 1.3/8 |
| Shank Diameter | 0.687 |
| Overall Length | 3.1/8 |
| 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 - NPT Spiral Point HSS-E - Steam Oxide Coated - Through Hole
View full collection →You are viewing OSG-22628794. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Flute Length | Shank Diameter | Overall Length | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|
| OSG-22628764 | 1/8 | 27 | 0.75 | 0.318 | 2.1/8 | £69.52 | In Stock | |
| OSG-22628774 | 1/4 | 18 | 1.1/16 | 0.429 | 2.7/16 | £95.62 | In Stock | |
| OSG-22628784 | 3/8 | 18 | 1.1/16 | 5.542 | 3.3/16 | £112.98 | In Stock | |
| OSG-22628794 Viewing | 1/2 | 14 | 1.3/8 | 0.687 | 3.1/8 | £139.05 | In Stock | |
| OSG-22628804 | 3/4 | 14 | 1.3/8 | 0.906 | 3.1/4 | £201.63 | 1-2 days | |
| OSG-22628814 | 1 | 11.5 | 1.3/4 | 1.125 | 3.3/4 | £272.89 | 1-2 days |
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