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Carmex Carbide Threading Insert - NPSM - TiAlN Coated - 21E14NPSM

SKU:21E14NPSM

The Carmex Carbide Threading Insert for NPSM is a versatile, TiAlN-coated cutting solution designed for machinists who need reliable threading across a wide range of profiles. Built to withstand d... Read more ↓
P
M
K
N
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ApplicationThreading
Thread FormNSPM
Internal or ExternalExternal
Insert Size21
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£30.44
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
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01732 887334
Mon – Thurs 8:30 – 17:30 · Fri 8:30 – 16:30

Description

The Carmex Carbide Threading Insert for NPSM is a versatile, TiAlN-coated cutting solution designed for machinists who need reliable threading across a wide range of profiles. Built to withstand demanding machining conditions, this insert family simplifies setup and extends tool life in both internal and external threading tasks.

  • Wide thread profile coverage: A comprehensive collection that spans all common thread profiles, reducing the need for multiple inserts.
  • Five length options: Available in lengths from 12 mm to 40 mm to suit different machine setups and depth-of-cut requirements.
  • Pitch range versatility: Depending on length, capable of threading pitches from 0.5 mm (32 TPI) up to 6.0 mm (4 TPI).
  • Double-sided cutting edges: Each insert provides two cutting edges for extended life (except for BSPT/NPT/NPTF/American Buttress/API RD standards).
  • Internal and external threading compatibility: For many profiles, the same insert can machine both internal and external threads (excluding ISO, UN, NPSM, UNJ, and Acme).
  • TiAlN-coated carbide: Coating enhances wear resistance and enables longer use in tougher materials and higher-speed applications.
  • Precise identification: Part number 21E14NPSM ensures accurate selection and replacement within Carmex’s NPSM threading insert family.

These inserts are designed to streamline your threading operations: use a single, durable tool for a variety of profiles, reduce tool changes with the double-edged design, and maintain consistent thread quality across both internal and external applications. The TiAlN coating adds reliability in challenging materials, helping you achieve clean, accurate threads with fewer passes and less downtime.

Part Numbers

Protool Part Number
21E14NPSM
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 Carbide Threading Inserts - NPSM - TiAlN Coated

View full collection →

You are viewing 21E14NPSM. Click any other SKU to view its full details.

Product SKUInsert SizePitchPriceStock Order
12I18NPSM 1218£22.91 5 days
14E18NPSM 1418£22.91 5 days
14I18NPSM 1418£22.91 In Stock
21E11.5NPSM 2111.5£30.44 5 days
21E14NPSM Viewing2114£30.44 5 days
21I11.5NPSM 2111.5£39.62 In Stock
21I14NPSM 2114£30.44 5 days
30E11.5NPSM 3011.5£41.74 5 days
30E8NPSM 308£41.74 5 days
30I11.5NPSM 3011.5£41.74 5 days
30I8NPSM 308£41.74 5 days
40E11.5NPSM 4011.5£72.20 5 days
40E8NPSM 408£72.20 5 days
40I11.5NPSM 4011.5£72.20 5 days

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