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Carmex Thread Mills Solid Carbide - External - UNJ (UNJC UNJF UNJEF UNJS) - 12mm x 20 - MT7
| Thread Form | UNJ (UNJC UNJF UNJEF UNJS) |
| Size | 12mm |
| Pitch | 20 |
| Diameter (D) | 12 |
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Description
The Carmex Thread Mills Solid Carbide External UNJ tool is engineered for precise external thread milling on CNC machines, supporting UNJ forms (UNJC, UNJF, UNJEF, UNJS) with consistent accuracy and a superior surface finish. Built for shop floors that demand reliability and clean threads, it delivers dependable performance across demanding applications.
- External thread milling for UNJ forms: Precisely milled threads in UNJC, UNJF, UNJEF, and UNJS profiles for reliable fit and function.
- Solid carbide construction: High rigidity and wear resistance ensure long tool life in tough materials and high‑production environments.
- 12 mm cutting diameter: Optimized for standard UNJ thread pitches with tight, accurate engagement.
- MT7 shank: Compatible with a wide range of CNC heads and holders for versatile setup and quick-change capability.
- Spiral flute geometry: Enhances chip evacuation and delivers a smoother, more consistent surface finish on threaded features.
- Multi-flute design (3–5 flutes): Balances rapid material removal with rigidity and improved surface quality, reducing overall cycle times.
- Efficiency-focused design: The combination of spiral flutes and multiple cutting edges minimizes machining time while preserving thread integrity and profile accuracy.
This thread mill enables clean, precise UNJ threads with fewer finishing steps. The spiral flutes and optimised flute count deliver fast, reliable cutting, while the carbide body provides predictable performance and extended tool life across a range of materials. Ideal for aerospace, automotive, and precision-manufacturing contexts where UNJ thread standards matter and production efficiency is a priority.
Part Numbers
- Protool Part Number
- EMT1212E2720UNJMT7
- Brand
- Carmex
- Category
- Thread Mill
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: Carmex Solid Carbide Thread Mills - UNJ - For External Thread (MT)
View full collection →You are viewing EMT1212E2720UNJMT7. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Flute Length | Reach | Shank Diameter | Overall Length | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|---|
| EMT0606C1332UNJMT7 | 6mm | 32 | 13.9 | 13.9 | 6 | 57 | £127.64 | 5 days | |
| EMT0808D1728UNJMT7 | 8mm | 28 | 17.7 | 17.7 | 8 | 63 | £170.02 | 5 days | |
| EMT1010D2024UNJMT7 | 10mm | 24 | 20.6 | 20.6 | 10 | 72 | £196.16 | 5 days | |
| EMT1212D2612UNJMT7 | 12mm | 12 | 26.5 | 26.5 | 12 | 83 | £245.38 | 5 days | |
| EMT1212D2614UNJMT7 | 12mm | 14 | 26.3 | 26.3 | 12 | 83 | £245.38 | 5 days | |
| EMT1212D2616UNJMT7 | 12mm | 16 | 26.2 | 26.2 | 12 | 83 | £245.38 | 5 days | |
| EMT1212D2618UNJMT7 | 12mm | 18 | 26.1 | 26.1 | 12 | 83 | £245.38 | 5 days | |
| EMT1212E2720UNJMT7 Viewing | 12mm | 20 | 27.3 | 27.3 | 12 | 83 | £245.38 | 5 days |
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