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OSG Threading Tap - Metric Spiral Flute HSS-E - Steam Oxide Coated - Blind Hole - M39 x 4
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Description
The OSG Metric Spiral Flute Threading Tap is a high-performance tool designed for precise threading in blind holes, ideal for professional machinists and shops handling large-diameter metric threads. Crafted from HSS-E with cobalt and finished in steam oxide, it delivers durable cutting performance and excellent heat resistance in demanding tasks.
- Size/Thread: M39 x 4 — large-diameter metric thread for blind-hole applications.
- Flute Design: Spiral flute geometry optimized for efficient chip evacuation and reduced clogging.
- Material: High-Speed Steel with cobalt (HSS‑E) for enhanced hardness and wear resistance at elevated temperatures.
- Coating: Steam oxide coating to lower friction and improve heat dissipation during cutting.
- Application: Specifically suited for threading blind holes with clean, accurate thread formation.
- Technology: OSG’s advanced threading technology provides consistent results and reliable tool life in demanding environments.
This tap delivers reproducible, high-quality threads with fewer passes and less risk of tool chatter or breakage. The spiral flute design accelerates chip removal from blind holes, reducing heat buildup and extending tool life. Combined with the cobalt-infused HSS and steam oxide coating, it maintains a sharp cutting edge for longer, ensuring precise threads and improved finish across challenging materials. A dependable choice for critical assemblies, mold work, and maintenance tasks where precision and durability matter.
Part Numbers
- Protool Part Number
- OSG-22203044
- Brand
- OSG
- Category
- Threading Tap
Delivery
Free UK mainland delivery on orders over £50 ex VAT. In-stock items ordered before 4:30pm are dispatched the same working day. Full delivery information.
Returns
14-day returns on unused stock items in original packaging. Special-order and bespoke tooling is non-returnable. Read our returns policy.
Technical Support
Over 30 years of machining experience behind the counter. Call 01732 887334, Mon–Thurs 8:30–17:30, Fri 8:30–16:30.
Trade Accounts
Credit accounts, contract pricing and scheduled call-off orders available for trade customers. Apply for an account.
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 - Metric Spiral Flute HSS-E - Steam Oxide Coated - Blind Hole
View full collection →You are viewing OSG-22203044. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Flute Length | Shank Diameter | Overall Length | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|
| OSG-22201254 | M2 | 0.4 | 8 | 2.5 | 41 | £34.78 | In Stock | |
| OSG-T102022045 | M2.2 | 0.45 | 9.5 | 2.8 | 44.5 | £46.91 | 1-2 days | |
| OSG-22201334 | M2.5 | 0.45 | 9.5 | 2.8 | 44.5 | £28.67 | In Stock | |
| OSG-22201384 | M3 | 0.5 | 11 | 3.15 | 48 | £18.26 | In Stock | |
| OSG-22201404 | M3.5 | 0.6 | 13 | 3.55 | 50 | £20.86 | In Stock | |
| OSG-22201444 | M4 | 0.7 | 13 | 4 | 53 | £16.47 | In Stock | |
| OSG-22201464 | M4.5 | 0.75 | 13 | 4.5 | 53 | £23.47 | 1-2 days | |
| OSG-22201494 | M5 | 0.8 | 16 | 5 | 58 | £17.37 | In Stock | |
| OSG-22201554 | M6 | 1 | 19 | 6.3 | 66 | £17.82 | In Stock | |
| OSG-22201584 | M7 | 1 | 19 | 7.1 | 66 | £28.67 | In Stock | |
| OSG-22201614 | M8 | 1.25 | 22 | 8 | 72 | £19.55 | In Stock | |
| OSG-22201654 | M9 | 1.25 | 22 | 9 | 72 | £34.78 | 1-2 days | |
| OSG-22201694 | M10 | 1.5 | 24 | 10 | 80 | £25.21 | In Stock | |
| OSG-22201744 | M11 | 1.5 | 25 | 8 | 85 | £46.05 | 1-2 days | |
| OSG-22201794 | M12 | 1.75 | 29 | 9 | 89 | £35.63 | In Stock | |
| OSG-22201914 | M14 | 2 | 30 | 11.2 | 95 | £45.19 | In Stock | |
| OSG-22202024 | M16 | 2 | 32 | 12.5 | 102 | £53.88 | In Stock | |
| OSG-22202144 | M18 | 2.5 | 37 | 14 | 112 | £79.95 | In Stock | |
| OSG-22202284 | M20 | 2.5 | 37 | 14 | 112 | £88.64 | In Stock | |
| OSG-22202384 | M22 | 2.5 | 38 | 16 | 118 | £107.76 | In Stock | |
| OSG-22202474 | M24 | 3 | 45 | 18 | 130 | £132.11 | In Stock | |
| OSG-22202624 | M27 | 3 | 45 | 20 | 135 | £212.06 | In Stock | |
| OSG-22202714 | M30 | 3.5 | 48 | 20 | 138 | £231.20 | In Stock | |
| OSG-22202814 | M33 | 3.5 | 51 | 22.4 | 151 | £347.65 | In Stock | |
| OSG-22202944 | M36 | 4 | 57 | 25 | 162 | £405.01 | In Stock | |
| OSG-22203044 Viewing | M39 | 4 | 60 | 28 | 170 | £439.77 | 1-2 days | |
| OSG-22203144 | M42 | 4.5 | 60 | 28 | 170 | £521.47 | In Stock |
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