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OSG Threading Tap - NPT Spiral Flute HSS-E - Steam Oxide Coated - Blind Hole - 1 x 11.5
| Form | NPT |
| Size | 1 |
| Pitch | 11.5 |
| Flute Length | 1.3/4 |
| Shank Diameter | 1.125 |
| Overall Length | 3.3/4 |
Learn more about Klarna
Engineered for precision blind-hole threading, the OSG Threading Tap delivers reliable NPT spiraled-flute performance you can trust in demanding metalworking tasks. Built with HSS‑E cobalt and a durable Steam Oxide finish, this tap is designed to withstand heat and wear for long tool life.
- Type: NPT Spiral Flute Threading Tap for blind holes
- Material: HSS‑E (high-speed steel with cobalt) for improved heat resistance and durability
- Coating: Steam Oxide coating to enhance wear resistance and extend life
- Size: 1 x 11.5
- Chip Evacuation: Spiral flute design optimizes chip removal in confined blind-hole applications
- Precision: OSG’s advanced threading technology delivers accurate, consistent threads
This tap supports clean, tight NPT threads in hard materials, reducing rework and downtime. The combination of cobalt-enhanced steel and the steam oxide coating provides strong performance under heat, while the spiral flute minimizes chip packing, helping maintain smooth cutting action across multiple passes. Ideal for critical machining tasks in plumbing, hydraulics, and precision assemblies where dependable thread quality matters.
| Form | NPT |
| Size | 1 |
| Pitch | 11.5 |
| Flute Length | 1.3/4 |
| Shank Diameter | 1.125 |
| Overall Length | 3.3/4 |
| Substrate | HSS-E |
| Style | Spiral Flute |
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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-22638814. 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 | 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 Viewing | 1 | 11.5 | 1.3/4 | 1.125 | 3.3/4 | £319.85 | 1-2 days |
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