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Carmex Thread Mills Solid Carbide - External - UNJ (UNJC UNJF UNJEF UNJS) - 12mm x 18 - MT7
| Thread Form | UNJ (UNJC UNJF UNJEF UNJS) |
| Size | 12mm |
| Pitch | 18 |
| Diameter (D) | 12 |
| Flute Length (l) | 26.1 |
| Shank Diameter (d) | 12 |
Learn more about Klarna
The Carmex Thread Mills Solid Carbide external tool is engineered for precise UNJ thread milling, delivering reliable, high-quality external threads in demanding materials. Designed for professional workshop environments, it combines robust carbide construction with a geometry aimed at top-tier surface finish and efficiency.
- Material: Solid carbide construction for outstanding rigidity, wear resistance, and long tool life in tough metals.
- Threading compatibility: External thread mill compatible with UNJ thread forms (UNJC, UNJF, UNJEF, UNJS) for versatile applications.
- Size and geometry: 12 mm diameter with 18 mm length of cut, optimized for consistent thread pitch and accuracy.
- Shank type: MT7 taper shank for secure, high-torque engagement on compatible CNC machines.
- Flute design: Spiral flutes that enhance surface finish on threaded features and improve chip evacuation during cuttings.
- Flute count: Multi-flute configuration (3–5 flutes) to balance fast material removal with precise thread quality.
This tool is ideal for manufacturing teams focused on repeatable UNJ threads in automotive, aerospace, and industrial components. The combination of spiral flute geometry and a multi-flute count translates to smoother threading operations, fewer passes, and cleaner, more consistent thread profiles—helping parts assemble with reliable torque and engagement. The MT7 shank provides stable drive in rigid setups, enabling high-performance milling without sacrificing precision.
| Thread Form | UNJ (UNJC UNJF UNJEF UNJS) |
| Size | 12mm |
| Pitch | 18 |
| Diameter (D) | 12 |
| Flute Length (l) | 26.1 |
| Shank Diameter (d) | 12 |
| No of Flutes | 4 |
| Overall Length (L) | 83 |
| Thread Mill Style | Standard |
| Internal or External | External |
| Coating | MT7 |
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 EMT1212D2618UNJMT7. 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 Viewing | 12mm | 18 | 26.1 | 26.1 | 12 | 83 | £245.38 | 5 days | |
| EMT1212E2720UNJMT7 | 12mm | 20 | 27.3 | 27.3 | 12 | 83 | £245.38 | 5 days |
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