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Carmex Thread Mills Carbide - Single Point - UN (UNC UNF UNEF UNS) - No. 4 x 40 - MT11
| Thread Form | UN (UNC UNF UNEF UNS) |
| Size | No. 4 |
| Pitch | 40 |
| Diameter (D) | 2.1 |
| Flute Length (l) | 1.91 |
| Shank Diameter (d) | 3 |
Learn more about Klarna
Carmex Thread Mills Carbide - Single Point is a high-precision full-profile tool designed to create internal threads in metal parts. Built for shops and manufacturers that require reliable small-to-medium thread sizes, it delivers consistent, clean threads in ISO metric and imperial standards.
- Tool type: Full-profile carbide thread mill for internal threading
- Thread compatibility: Supports ISO M1 x 0.25 and 0-80 UNC/UNF/UNEF/UNS internal threads
- Size and drive: No. 4 x 40 with MT11 drive
- Flutes: 3–4 flutes for stable cutting and efficient chip evacuation
- Coating: Triple blue PVD coating for wear resistance and reduced friction
- Material: Carbide for rigidity and heat resistance in demanding materials
- Depth capability: Thread depth up to 3.5× thread diameter (dependent on profile)
- Grade: MT11 ultra-fine sub-micron grade for precise finishing
This internal-thread milling solution enables precise threading in a single operation, enhancing concentricity and finish quality. The carbide construction provides stiffness for steady milling, while the MT11 ultra-fine grade and PVD coating extend tool life and maintain tight tolerances in challenging metals. The tool’s depth capability supports deeper holes without needing multiple tools, and the 3–4 flute design improves chip evacuation and reduces cutting chatter, delivering reliable results for housings, adapters, and other threaded components that must meet strict dimensional standards.
| Thread Form | UN (UNC UNF UNEF UNS) |
| Size | No. 4 |
| Pitch | 40 |
| Diameter (D) | 2.1 |
| Flute Length (l) | 1.91 |
| Shank Diameter (d) | 3 |
| No of Flutes | 3 |
| Overall Length (L) | 39 |
| Thread Mill Style | Single Point |
| Internal or External | Internal |
| Coating | MT11 |
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 Carbide Thread Mills - UN - Mini Type For Internal Thread (MTI)
View full collection →You are viewing MTI03021C1040UNMT11. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Flute Length | Reach | Shank Diameter | Overall Length | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|---|
| MTI03012C580UNMT11 | No. 0 | 80 | N/A | 5.5 | 3 | 39 | £95.44 | 5 days | |
| MTI03015C772UNMT11 | No. 1 | 72 | 1.06 | 6.6 | 3 | 39 | £95.44 | 5 days | |
| MTI03016C956UNMT11 | No. 2 No. 3 | 56 | N/A | 8.9 | 3 | 39 | £95.44 | 5 days | |
| MTI03021C1040UNMT11 Viewing | No. 4 | 40 | 1.91 | 10.1 | 3 | 39 | £95.44 | 5 days |
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