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Carmex Thread Mills Solid Carbide - With Through Coolant - NPSF - 1/4 - 3/8 x 18 - MT7
| Thread Form | NPSF |
| Size | 1/4 - 3/8 |
| Pitch | 18 |
| Diameter (D) | 9.5 |
| Flute Length (l) | 16.2 |
| Shank Diameter (d) | 3/8 |
Learn more about Klarna
The Carmex MTB solid carbide thread mill with through coolant is engineered for precision NPSF thread milling. Built for shops that demand reliable chip evacuation and longer tool life, it excels in deep-hole threading and challenging materials.
- Through-Coolant Bore: Delivers coolant directly through the tool to the cutting edges, improving chip removal and cooling in deep holes.
- Solid Carbide Construction: High rigidity and wear resistance for accurate, consistent threads and longer tool life.
- MT7 Shank: Robust, high-precision interface that fits a wide range of CNC spindles for secure performance.
- NPSF Thread Form: Optimized for National Pipe Straight Thread standards to ensure reliable engagement in fittings and housings.
- Thread Size Range: Cuts 1/4" to 3/8" diameter threads at 18 TPI (18 threads per inch).
Through-coolant threading creates a cleaner cutting environment, reducing chip buildup and heat that can affect tolerances. The result is tighter, more consistent thread profiles, fewer defects, and lower tooling costs over time. The MT7 shank broadens compatibility with common CNC systems, while the carbide composition delivers durability for high-volume production scenarios—from hydraulic manifolds to automotive valve bodies.
| Thread Form | NPSF |
| Size | 1/4 - 3/8 |
| Pitch | 18 |
| Diameter (D) | 9.5 |
| Flute Length (l) | 16.2 |
| Shank Diameter (d) | 3/8 |
| No of Flutes | 4 |
| Overall Length (L) | 76 |
| Thread Mill Style | Standard + Coolant |
| Internal or External | Internal |
| 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 - NPSF - With Through Coolant (MTB)
View full collection →You are viewing MTB0375D0618NPSFMT7. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Flute Length | Reach | Overall Length | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|
| MTB0312C0427NPSFMT7 | 1/8 | 27 | 10.8 | 10.8 | 63 | £127.18 | In Stock | |
| MTB0375D0618NPSFMT7 Viewing | 1/4 - 3/8 | 18 | 16.2 | 16.2 | 76 | £146.70 | 5 days | |
| MTB0625D0814NPSFMT7 | 1/2 - 3/4 | 14 | 22.7 | 22.7 | 101 | £216.59 | 5 days | |
| MTB0750D1111.5NPSFMT7 | 1 - 2 | 11.5 | 29.8 | 29.8 | 101 | £261.57 | 5 days |
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