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Carmex Thread Mills Multifunction - With Coolant - UN (UNC UNF UNEF UNS) - 5/16 - 1/2 x 24 - MT7

SKU:DMT08065D1724UNMT7

Carmex Thread Mills Multifunction with coolant is a single, high-efficiency threading solution designed for machinists who want to streamline hole-making. It combines drilling, chamfering, and th... Read more ↓
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Thread FormUN (UNC UNF UNEF UNS)
Size5/16 - 1/2
Pitch24
Diameter (D)6.5
Flute Length (l)17
Shank Diameter (d)8
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£108.44
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5 days estimated lead time — subject to availability
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Carmex Thread Mills Multifunction with coolant is a single, high-efficiency threading solution designed for machinists who want to streamline hole-making. It combines drilling, chamfering, and thread milling in one pass, making it ideal for production environments that demand fast cycle times and reliable threads in both blind and through holes.

  • Thread forms supported: UN (UNC, UNF, UNEF, UNS) threads are accommodated, giving you broad compatibility across common standards.
  • Size / pitch: 5/16 - 1/2 x 24 with MT7 shank for versatile use on standard milling machines.
  • Multifunction capability: Drilling, chamfering, and full-profile thread milling are performed with a single tool, eliminating separate operations and tool changes.
  • Coolant through tooling: Integrated coolant capability enhances chip evacuation, reduces heat, and extends tool life for demanding materials.
  • Hole versatility: Suitable for both blind and through holes, with a consistent thread profile from the first cut to the last.
  • Left- and right-hand threads: One tool handles both right-hand and left-hand threaded parts without changing tooling.
  • Material range: Designed to cut a wide range of materials, supporting various alloys and grades encountered in production.

This multifunction thread mill is built for efficiency and accuracy in busy shops. By delivering drilling, chamfering, and threading in a single pass, it minimizes downtime, reduces tooling inventory, and helps you maintain tight tolerances on every part. The combination of coolant through the tool, full-profile threads, and compatibility with multiple UN thread forms translates to predictable performance, improved surface finish, and lower overall machining costs—especially in high-volume applications like automotive, aerospace, and general precision manufacturing.

Thread Form UN (UNC UNF UNEF UNS)
Size 5/16 - 1/2
Pitch 24
Diameter (D) 6.5
Flute Length (l) 17
Shank Diameter (d) 8
No of Flutes 4
Overall Length (L) 64
Thread Mill Style Multifunction + 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.

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Staff are very helpful and interested in providing a good service making us the customer feel valued.
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Staff are very helpful and polite.Goods that were in stock were dispatched same day and back orders were quick in coming through .
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Buying experience
Phone requests are handled quickly and without any fuss. The website is easy to use and straightforward to order from. It’s especially helpful that it shows real‑time availability, so we don’t need to call to confirm whether parts will arrive.
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Full Range: Carmex Carbide Thread Mills - UN With Coolant (DMT)

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