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Carmex Thread Mills Solid Carbide - Internal & External Thread - NPTF - 2 1/2 + x 8 - MT7

SKU:MT2020D398NPTFMT7

The Carmex MT solid carbide thread mills are engineered to deliver precise internal and external threading with NPTF profiles, making them a reliable and cost-efficient choice for machine shops an... Read more ↓
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M
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Thread FormNPTF
Size2 1/2 +
Pitch8
Diameter (D)20
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£237.79
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In Stock— only 1 left
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30+ years expertise
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01732 887334
Mon – Thurs 8:30 – 17:30 · Fri 8:30 – 16:30

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Description

The Carmex MT solid carbide thread mills are engineered to deliver precise internal and external threading with NPTF profiles, making them a reliable and cost-efficient choice for machine shops and job sites that demand consistent thread quality.

  • Solid carbide construction: Built for high hardness and wear resistance, delivering long tool life across a range of materials.
  • Internal & External threading: One tool handles both bore threading and external thread milling, simplifying setups and reducing tool changes.
  • Multi-flute design (3–5 flutes): Optimizes cutting efficiency and chip evacuation to produce clean, accurate threads with stable performance.
  • MT7 shank: Robust Morse taper shank for secure, rigid mounting on compatible milling machines, enhancing precision and rigidity.
  • Size: 2 1/2 + x 8 (specifications as listed for this MT7 tool)
  • Application focus: Ideal for threading applications such as pipe fittings, hydraulic components, and other parts requiring precise NPTF threads.

With the MT threading line, you gain a dependable, efficient solution that minimizes setup time while maximizing thread accuracy. The combination of a tough carbide body and a carefully engineered flute count supports consistent results across multiple passes, helping you reduce scrap and rework. The MT7 shank ensures a secure fit in your machine, promoting steady cuts and reliable tolerances whether you’re shaping internal holes or external threads for standard NPTF profiles. This tool is well-suited for shops that need a single, versatile threading solution for varied metals and production demands.

Part Numbers

Protool Part Number
MT2020D398NPTFMT7
Brand
Carmex
Category
Thread Mill
Delivery

Free UK mainland delivery on orders over £50 ex VAT. In-stock items ordered before 4:30pm are dispatched the same working day. Full delivery information.

Returns

14-day returns on unused stock items in original packaging. Special-order and bespoke tooling is non-returnable. Read our returns policy.

Technical Support

Over 30 years of machining experience behind the counter. Call 01732 887334, Mon–Thurs 8:30–17:30, Fri 8:30–16:30.

Trade Accounts

Credit accounts, contract pricing and scheduled call-off orders available for trade customers. Apply for an account.

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.

Ask our technical team about this tool

Not sure if this is the right tool for your job? Ask us about speeds and feeds, material suitability, holders or alternatives — 30+ years of machining experience on the other end.

Prefer to talk? Call 01732 887334 — Mon–Thurs 8:30–17:30, Fri 8:30–16:30.

Full Range: Carmex Solid Carbide Thread Mills - NPTF - For Internal & External Thread (MT)

View full collection →

You are viewing MT2020D398NPTFMT7. Click any other SKU to view its full details.

Product SKUSizePitchFlute LengthReachOverall LengthPriceStock Order
MT0606C927NPTFMT7 1/16 1/8279.99.958£86.80 In Stock
MT0808C1418NPTFMT7 1/4 3/81814.814.864£115.62 5 days
MT1212D2014NPTFMT7 1/2 3/41420.920.984£166.90 5 days
MT1616D2711.5NPTFMT7 1 - 211.527.627.6105£196.90 5 days
MT2020D398NPTFMT7 Viewing2 1/2 +839.739.7105£237.79 In Stock

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