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Carmex Thread Mills Solid Carbide - Fast Type - With Internal Coolant Bore - UN (UNC UNF UNEF UNS) - 5/16 x 24 - MT8
| Thread Form | UN (UNC UNF UNEF UNS) |
| Size | 5/16 |
| Pitch | 24 |
| Diameter (D) | 6.6 |
| Flute Length (l) | 14.3 |
| Shank Diameter (d) | 10 |
Learn more about Klarna
Introducing the Carmex FMT/Fast MT solid carbide thread mill—a high-performance tool designed for rapid, precise threading in metalworking environments. Built for machinists and production floors that demand speed without compromising thread quality, it delivers reliable UNC, UNF, UNEF, and UNS threading in a 5/16-24 size with an MT8 shank.
- Material: Solid carbide construction for exceptional rigidity and wear resistance across demanding threading tasks.
- Flute Count: 5–8 flutes to increase material removal rates and shorten cycle times.
- Internal Coolant Bore: Directs coolant to the cutting edges and aids chip evacuation for better heat management.
- Shank: MT8 shank design for broad machine compatibility and secure tool retention.
- Thread Compatibility: Optimized for UNC, UNF, UNEF, and UNS threads; sized at 5/16" diameter with 24 threads per inch (5/16 x 24).
- Fast Type Geometry: Geometry tuned for high-speed threading that maintains accuracy and finish.
Designed for high-production threading, this tool reduces cycle times, maintains clean, accurate threads, and offers dependable performance under coolant-assisted cutting. The combination of a dense flute arrangement and internal cooling makes it well-suited for demanding applications where fast, repeatable threaded features are essential—whether manufacturing fasteners, fittings, or precision components on steel, aluminum, or other common metals. The MT8 shank and universal thread compatibility simplify tooling setups, helping shops improve uptime and consistency across threaded workpieces.
| Thread Form | UN (UNC UNF UNEF UNS) |
| Size | 5/16 |
| Pitch | 24 |
| Diameter (D) | 6.6 |
| Flute Length (l) | 14.3 |
| Shank Diameter (d) | 10 |
| No of Flutes | 7 |
| Overall Length (L) | 73 |
| Thread Mill Style | Fast + Chamfer + Coolant |
| Internal or External | Internal |
| Coating | MT8 |
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 Fast Solid Carbide Thread Mills - UN (UNC, UNF, UNEF) - With Internal Coolant Bore (FMT)
View full collection →You are viewing FMT10066G1424UNMT8. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Flute Length | Reach | Shank Diameter | Overall Length | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|---|
| FMT08048E1220UNMT8 | 1/4 | 20 | 12.1 | 12.1 | 8 | 64 | £187.10 | 5 days | |
| FMT08052F1128UNMT8 | 1/4 | 28 | 11.3 | 11.3 | 8 | 64 | £187.10 | 5 days | |
| FMT10066G1424UNMT8 Viewing | 5/16 | 24 | 14.3 | 14.3 | 10 | 73 | £215.78 | 5 days | |
| FMT1006F1418UNMT8 | 5/16 | 18 | 14.8 | 14.8 | 10 | 73 | £215.78 | 5 days | |
| FMT10074F1616UNMT8 | 3/8 | 16 | 16.7 | 16.7 | 10 | 73 | £215.78 | 5 days | |
| FMT12082G1724UNMT8 | 3/8 9/16 5/8 11/16 | 24 | 17.5 | 17.5 | 12 | 84 | £269.98 | 5 days | |
| FMT12085F2014UNMT8 | 7/16 7/8 | 14 | 22 | 22 | 12 | 84 | £269.98 | 5 days | |
| FMT12092H2120UNMT8 | 7/16 | 20 | 21 | 21 | 12 | 84 | £269.98 | 5 days | |
| FMT12098F2413UNMT8 | 1/2 | 13 | 24.4 | 24.4 | 12 | 84 | £269.98 | 5 days | |
| FMT12098H1928UNMT8 | 7/16 - 1/2 | 28 | 20.5 | 20.5 | 12 | 84 | £269.98 | 5 days | |
| FMT14111H2220UNMT8 | 1/2 3/4 7/8 1 | 20 | 22.2 | 22.2 | 14 | 84 | £300.30 | 5 days | |
| FMT16116F2612UNMT8 | 9/16 1 | 12 | 26.5 | 26.5 | 16 | 105 | £318.52 | 5 days | |
| FMT16125H2618UNMT8 | 9/16 5/8 1 1/16 1 1/8 | 18 | 26.1 | 26.1 | 16 | 105 | £318.52 | 5 days | |
| FMT1612F3311UNMT8 | 5/8 | 11 | 33.4 | 33.4 | 16 | 105 | £318.52 | 5 days | |
| FMT20167H3416UNMT8 | 3/4 | 16 | 34.1 | 34.1 | 20 | 105 | £349.70 | 5 days |
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