Please log in here to access all benefits, including multibuy discounts and faster checkouts.

Carmex Thread Mills Solid Carbide - Internal & External Thread - NPTF - 1/4, 3/8 x 18 - MT7
| Thread Form | NPTF |
| Size | 1/4 3/8 |
| Pitch | 18 |
| Diameter (D) | 8 |
| Flute Length (l) | 14.8 |
| Shank Diameter (d) | 8 |
Learn more about Klarna
Carmex MT Thread Mills fuse solid carbide durability with a focused threading solution for internal and external NPTF profiles. Designed for machining shops and production environments, these mills deliver reliable, cost-efficient thread creation in a single tool.
- Threading capability: Internal and external NPTF threading with sizes 1/4-18 and 3/8-18, enabling versatile work on fittings and housings.
- Flute count: Optimized 3–5 flutes for smooth cutting, stable thread formation, and efficient chip evacuation.
- Material: Solid carbide construction provides high hardness, wear resistance, and long tool life under demanding threading tasks.
- Shank: MT7 shank for compatibility with standard milling holders and quick tool changes in busy shops.
- Tool geometry: Precisely ground edges and flute geometry tailored for clean, accurate thread profiles and consistent results.
- Operational efficiency: Designed to reduce setup time and tool changes while delivering repeatable threads in production runs.
This single-tool solution excels in environments where precise NPTF threads are essential—such as hydraulic, pneumatic, and fluid-handling components—by delivering dependable performance with a lower total cost of ownership. The MT line focuses on dependable threading performance, helping you achieve tight tolerances and repeatable results across multiple parts without switching tools.
| Thread Form | NPTF |
| Size | 1/4 3/8 |
| Pitch | 18 |
| Diameter (D) | 8 |
| Flute Length (l) | 14.8 |
| Shank Diameter (d) | 8 |
| No of Flutes | 3 |
| Overall Length (L) | 64 |
| Thread Mill Style | Standard |
| Internal or External | Internal & 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 - NPTF - For Internal & External Thread (MT)
View full collection →You are viewing MT0808C1418NPTFMT7. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Flute Length | Reach | Overall Length | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|
| MT0606C927NPTFMT7 | 1/16 1/8 | 27 | 9.9 | 9.9 | 58 | £65.10 | In Stock | |
| MT0808C1418NPTFMT7 Viewing | 1/4 3/8 | 18 | 14.8 | 14.8 | 64 | £86.72 | 5 days | |
| MT1212D2014NPTFMT7 | 1/2 3/4 | 14 | 20.9 | 20.9 | 84 | £125.18 | 5 days | |
| MT1616D2711.5NPTFMT7 | 1 - 2 | 11.5 | 27.6 | 27.6 | 105 | £147.68 | 5 days | |
| MT2020D398NPTFMT7 | 2 1/2 + | 8 | 39.7 | 39.7 | 105 | £178.34 | In Stock |
No products match your filters.








