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Carmex Thread Mills Solid Carbide - With Through Coolant - Metric - M20 x 1.5 - MT7

SKU:MTB1616F331.5ISOMT7

Carmex Thread Mills Solid Carbide with Through Coolant is designed for precise internal threading in metric holes, delivering dependable performance for precision shops and high-volume manufactur... Read more ↓
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M
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Thread FormMetric
SizeM20
Pitch1.5
Diameter (D)16
Flute Length (l)33.8
Shank Diameter (d)16
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£216.59
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5 days estimated lead time — subject to availability
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Carmex Thread Mills Solid Carbide with Through Coolant is designed for precise internal threading in metric holes, delivering dependable performance for precision shops and high-volume manufacturing. With a through-bore coolant design and MT7 shank, it supports clean chip evacuation and consistent hole quality in challenging depths.

  • Through-Coolant Bore: Coolant is delivered through the tool bore to the cutting zone, enhancing chip removal and reducing friction inside deep or tight holes.
  • Solid Carbide Construction: Hard-wearing carbide body for high rigidity, wear resistance, and stable threading under demanding conditions.
  • Metric Size: M20 x 1.5 thread profile, suitable for common metric fasteners and standard machining setups.
  • MT7 Shank Interface: Robust MT7 connection for precise alignment and rigidity in CNC milling centers.
  • Internal Thread Milling: Optimized geometry tailored for accurate, high-quality internal threads in a single or multi-pass process.
  • MTB Line Innovation: Builds on proven MT tooling with enhanced cooling-by-design to extend tool life and improve reliability in production environments.

The through-coolant capability helps minimize chip buildup, which can compromise thread accuracy and hole finish. By cooling the cutting edges from within the bore, this tool sustains sharper threads, reduces wear, and lowers overall tooling costs over time. Ideal for automotive, aerospace, and general precision applications that demand repeatable internal threads, long tool life, and efficient chip management. Operators benefit from fewer tool changes, steadier hole quality, and better surface finish in challenging materials and deeper holes.

Thread Form Metric
Size M20
Pitch 1.5
Diameter (D) 16
Flute Length (l) 33.8
Shank Diameter (d) 16
No of Flutes 6
Overall Length (L) 105
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.

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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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honest about stock and prices are competitive.
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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 Solid Carbide Thread Mills - ISO Metric - With Through Coolant (MTB)

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