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OSG Threading Tap - NPT Spiral Flute HSS-E - Steam Oxide Coated - Blind Hole - 1/8 x 27
| Form | NPT |
| Size | 1/8 |
| Pitch | 27 |
| Flute Length | 0.75 |
| Shank Diameter | 0.318 |
| Overall Length | 2.1/8 |
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The OSG NPT Spiral Flute Threading Tap is engineered for precise blind-hole threading, delivering reliable 1/8-27 NPT threads in metalworking projects. Built for professionals who demand consistent results, it combines robust materials with a finish designed to endure demanding tapping tasks.
- Thread type: 1/8-27 NPT blind-hole threading for pipe-thread applications
- Material: HSS‑E (high-speed steel with cobalt) for superior hardness and heat resistance
- Coating: Steam Oxide coating enhances wear life and lubricity during cutting
- Flute design: Spiral flute geometry optimizes chip evacuation in blind holes, reducing clogging
- Application: Specifically suited for accurate threading in confined blind-hole workpieces
- Size: 1/8" diameter with 27 TPI (1/8-27 NPT)
This tap helps you achieve clean, accurate threads while extending tool life. The cobalt-infused HSS core maintains sharp cutting edges under heat, and the steam-oxide finish provides durable, consistent performance across multiple taps. Its spiral flutes actively push chips out of the hole, minimizing binding and reducing the risk of thread damage in blind-hole scenarios. Ideal for precision pipe-thread tasks in metalworking environments, it supports efficient, repeatable results with reduced downtime.
| Form | NPT |
| Size | 1/8 |
| Pitch | 27 |
| Flute Length | 0.75 |
| Shank Diameter | 0.318 |
| Overall Length | 2.1/8 |
| Substrate | HSS-E |
| Style | Spiral Flute |
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 - BSP Spiral Flute HSS-E - Steam Oxide Coated - Blind Hole
View full collection →You are viewing OSG-22638764. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Flute Length | Shank Diameter | Overall Length | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|
| OSG-22418004 | 1/8 | 28 | 15 | 8 | 59 | £29.55 | In Stock | |
| OSG-22418014 | 1/4 | 19 | 19 | 10 | 67 | £44.30 | In Stock | |
| OSG-22418024 | 3/8 | 19 | 21 | 12.5 | 75 | £61.69 | In Stock | |
| OSG-22418034 | 1/2 | 14 | 26 | 16 | 87 | £93.00 | In Stock | |
| OSG-22418044 | 5/8 | 14 | 26 | 18 | 91 | £116.01 | In Stock | |
| OSG-22418054 | 3/4 | 14 | 28 | 20 | 96 | £121.67 | In Stock | |
| OSG-22418074 | 1 | 11 | 33 | 25 | 109 | £217.29 | In Stock | |
| OSG-22618384 | 1/8 | 28 | 15 | 8 | 59 | £84.29 | In Stock | |
| OSG-22618394 | 1/4 | 19 | 19 | 10 | 67 | £107.76 | In Stock | |
| OSG-22618404 | 3/8 | 19 | 21 | 12.5 | 75 | £130.36 | In Stock | |
| OSG-22618414 | 1/2 | 14 | 26 | 16 | 87 | £159.91 | In Stock | |
| OSG-22618434 | 3/4 | 14 | 28 | 20 | 96 | £238.15 | 1-2 days | |
| OSG-22618454 | 1 | 11 | 33 | 25 | 109 | £319.85 | 1-2 days | |
| OSG-22638764 Viewing | 1/8 | 27 | 0.75 | 0.318 | 2.1/8 | £84.29 | In Stock | |
| OSG-22638774 | 1/4 | 18 | 1.1/16 | 0.429 | 2.7/16 | £107.76 | In Stock | |
| OSG-22638784 | 3/8 | 18 | 1.1/16 | 5.542 | 3.3/16 | £130.36 | In Stock | |
| OSG-22638794 | 1/2 | 14 | 1.3/8 | 0.687 | 3.1/8 | £159.91 | In Stock | |
| OSG-22638804 | 3/4 | 14 | 1.3/8 | 0.906 | 3.1/4 | £238.15 | 1-2 days | |
| OSG-22638814 | 1 | 11.5 | 1.3/4 | 1.125 | 3.3/4 | £319.85 | 1-2 days |
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