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Carmex Carbide Threading Insert - ISO/METRIC - TiAlN Coated - 12I1.25ISO

SKU:12I1.25ISO

The Carmex Carbide Threading Insert (ISO/METRIC, TiAlN Coated) is a versatile, high-precision solution designed for engineers and machinists who need reliable threading performance across a wide ... Read more ↓
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M
K
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ApplicationThreading
Thread FormISO
Internal or ExternalInternal
Insert Size12
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£29.81
Prices shown ex. VAT
In Stock— only 3 left
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Free delivery over £50 ex VAT
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14-day returns
30+ years expertise
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01732 887334
Mon – Thurs 8:30 – 17:30 · Fri 8:30 – 16:30

Description

The Carmex Carbide Threading Insert (ISO/METRIC, TiAlN Coated) is a versatile, high-precision solution designed for engineers and machinists who need reliable threading performance across a wide range of profiles. Part number 12I1.25ISO, this insert pairs a durable carbide substrate with a TiAlN coating to deliver consistent results in demanding environments.

  • TiAlN-coated carbide: Hardened carbide with a TiAlN coating for enhanced wear resistance and heat tolerance during threading.
  • Length options: Five lengths available, spanning from 12 mm to 40 mm, to fit a variety of toolholders and setups.
  • Thread profiles covered: Supports all common ISO metric thread profiles with pitches from 0.5 mm (32 TPI) to 6.0 mm (4 TPI).
  • Double-sided cutting edges: Each insert provides two cutting edges for extended tool life (except for BSPT/NPT/NPTF/American Buttress/API RD).
  • Internal/External versatility: For many profiles, the same insert can machine both internal and external threads (with noted exceptions).
  • Smart geometry for precision: Designed to deliver clean, accurate thread forms with consistent surface finish across multiple uses.

This single, well-rounded insert reduces the need to stock numerous variants, helping shops streamline tooling inventories while still delivering reliable, repeatable thread results. The combination of ISO/Metric compatibility, robust TiAlN coating, and a practical range of lengths makes it a practical choice for general production threading, repair work, and prototype machining alike. Note that certain thread types (BSPT/NPT/NPTF/American Buttress/API RD) have edge and capability exceptions—plan accordingly for those specific profiles.

Part Numbers

Protool Part Number
12I1.25ISO
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 - ISO/METRIC - TiAlN Coated

View full collection →

You are viewing 12I1.25ISO. Click any other SKU to view its full details.

Product SKUInsert SizePitchPriceStock Order
12I0.5ISO 120.5£29.81 In Stock
12I0.75ISO 120.75£29.81 In Stock
12I1.0ISO 121£29.81 In Stock
12I1.25ISO Viewing121.25£29.81 In Stock
12I1.5ISO 121.5£29.81 5 days
14I0.5ISO 140.5£29.81 In Stock
14E0.75ISO 140.75£29.81 In Stock
14I0.75ISO 140.75£29.81 In Stock
14E1.0ISO 141£29.81 In Stock
14I1.0ISO 141£29.81 5 days
14E1.25ISO 141.25£29.81 In Stock
14I1.25ISO 141.25£29.81 In Stock
14E1.5ISO 141.5£29.81 In Stock
14I1.5ISO 141.5£29.81 In Stock
14E1.75ISO 141.75£29.81 In Stock
14I1.75ISO 141.75£29.81 In Stock
14E2.0ISO 142£29.81 5 days
14I2.0ISO 142£29.81 5 days
14E2.5ISO 142.5£29.81 5 days
14I2.5ISO 142.5£29.81 In Stock
21E1.0ISO 211£39.62 In Stock
21I1.0ISO 211£39.62 In Stock
21E1.5ISO 211.5£39.62 In Stock
21I1.5ISO 211.5£39.62 5 days
21I1.75ISO 211.75£39.62 In Stock
21E2.0ISO 212£39.62 In Stock
21I2.0ISO 212£39.62 In Stock
21E2.5ISO 212.5£39.62 In Stock
21I2.5ISO 212.5£39.62 In Stock
21E3.0ISO 213£39.62 In Stock
21I3.0ISO 213£39.62 In Stock
21I3.5ISO 213.5£39.62 In Stock
30E1.5ISO 301.5£54.34 In Stock
30I1.5ISO 301.5£54.34 5 days
30E2.0ISO 302£54.34 In Stock
30I2.0ISO 302£54.34 In Stock
30E3.0ISO 303£54.34 In Stock
30I3.0ISO 303£54.34 In Stock
30E3.5ISO 303.5£54.34 In Stock
30I3.5ISO 303.5£54.34 In Stock
30E4.0ISO 304£54.34 5 days
30I4.0ISO 304£54.34 In Stock
30I4.5ISO 304.5£54.34 In Stock
30I5.0ISO 305£54.34 In Stock
30I5.5ISO 305.5£54.34 In Stock
40E1.5ISO 401.5£93.98 5 days
40I1.5ISO 401.5£93.98 5 days
40E2.0ISO 402£93.98 5 days
40I2.0ISO 402£93.98 5 days
40E3.0ISO 403£93.98 5 days
40I3.0ISO 403£93.98 5 days
40I3.5ISO 403£93.98 5 days
40E4.0ISO 404£93.98 5 days
40I4.0ISO 404£93.98 5 days
40I4.5ISO 404£93.98 5 days
40E5.0ISO 405£93.98 5 days
40I5.0ISO 405£93.98 5 days
40I5.5ISO 405.5£93.98 5 days
40E6.0ISO 406£93.98 5 days
40I6.0ISO 406£93.98 In Stock

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