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Carmex Spiral Mill Threading Insert - NPT - H23-11.5NPTMT7

SKU:H23-11.5NPTMT7

The Carmex Spiral Mill Threading Insert – NPT is a versatile, high-performance cutting insert designed for precision NPT threading and broader milling tasks. It’s built for a wide range of shops—... Read more ↓
P
M
K
N
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ApplicationThreading
Thread FormNPT
Internal or ExternalInternal & External
Insert SizeH23
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£60.18
Prices shown ex. VAT
5 days estimated lead time — subject to availability
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Free delivery over £50 ex VAT
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14-day returns
30+ years expertise
Klarna
Pay in 3 interest-free instalments. No extra cost if paid on time. 18+ only.
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01732 887334
Mon – Thurs 8:30 – 17:30 · Fri 8:30 – 16:30

Description

The Carmex Spiral Mill Threading Insert – NPT is a versatile, high-performance cutting insert designed for precision NPT threading and broader milling tasks. It’s built for a wide range of shops—from compact machining centers handling small components to heavy-duty production environments—delivering smooth cuts at higher feed rates to reduce overall cycle times.

With MT7 Sub-Micron Grade inserts and a Titanium Nitride multi-layer coating (ISO K10–K20), this tool combines wear resistance with a reliable finish across materials. Its spiral flute geometry and a unique clamping method support efficient indexing and long tool life, making it a dependable choice for threading, end milling roughing, and finishing in diverse applications.

  • Smooth, high‑feed threading: Spiral design enables fast cutting and reduced cycle times while maintaining clean, accurate NPT threads.
  • Flexible insert capacity with reliable indexing: Toolholders accommodate 1 to 9 inserts in a compact diameter, with a clamping system that ensures optimal indexability and stable operation.
  • Durable MT7 Sub‑Micron TiN coating: Sub-micron grade inserts with TiN multilayer coating deliver wear resistance across materials (ISO K10–K20) for consistent performance in threading and milling.

This insert is designed to deliver consistent results across a variety of materials and applications, helping you maintain tight tolerances, reduce downtime, and improve overall workflow. Whether you’re producing small, high-precision parts or tackling demanding milling tasks, it provides dependable performance, smooth finishes, and a clear path to efficient, repeatable results.

Part Numbers

Protool Part Number
H23-11.5NPTMT7
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 Spiral Mill Threading Inserts - NPT

View full collection →

You are viewing H23-11.5NPTMT7. Click any other SKU to view its full details.

Product SKUInsert SizePitchPriceStock Order
H13-18NPTMT7 H1318£40.08 5 days
H15-14NPTMT7 H1514£40.08 5 days
H17-14NPTMT7 H1714£40.08 5 days
H23-11.5NPTMT7 ViewingH2311.5£60.18 5 days
H32-14NPTMT7 H3214£51.28 5 days
H32-11.5NPTMT7 H3211.5£63.70 5 days
H45-11.5NPTMT7 H4511.5£70.73 5 days
H45-8NPTMT7 H458£54.33 5 days
H63-11.5NPTMT7 H6311.5£70.73 5 days
H63-8NPTMT7 H638£54.33 5 days

Complete Your Project

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