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Carmex Carbide Threading Insert - ISO/METRIC - TiAlN Coated - 12I1.25ISO
| Application | Threading |
| Thread Form | ISO |
| Internal or External | Internal |
| Insert Size | 12 |
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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.
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 SKU | Insert Size | Pitch | Price | Stock | Order |
|---|---|---|---|---|---|
| 12I0.5ISO | 12 | 0.5 | £29.81 | In Stock | |
| 12I0.75ISO | 12 | 0.75 | £29.81 | In Stock | |
| 12I1.0ISO | 12 | 1 | £29.81 | In Stock | |
| 12I1.25ISO Viewing | 12 | 1.25 | £29.81 | In Stock | |
| 12I1.5ISO | 12 | 1.5 | £29.81 | 5 days | |
| 14I0.5ISO | 14 | 0.5 | £29.81 | In Stock | |
| 14E0.75ISO | 14 | 0.75 | £29.81 | In Stock | |
| 14I0.75ISO | 14 | 0.75 | £29.81 | In Stock | |
| 14E1.0ISO | 14 | 1 | £29.81 | In Stock | |
| 14I1.0ISO | 14 | 1 | £29.81 | 5 days | |
| 14E1.25ISO | 14 | 1.25 | £29.81 | In Stock | |
| 14I1.25ISO | 14 | 1.25 | £29.81 | In Stock | |
| 14E1.5ISO | 14 | 1.5 | £29.81 | In Stock | |
| 14I1.5ISO | 14 | 1.5 | £29.81 | In Stock | |
| 14E1.75ISO | 14 | 1.75 | £29.81 | In Stock | |
| 14I1.75ISO | 14 | 1.75 | £29.81 | In Stock | |
| 14E2.0ISO | 14 | 2 | £29.81 | 5 days | |
| 14I2.0ISO | 14 | 2 | £29.81 | 5 days | |
| 14E2.5ISO | 14 | 2.5 | £29.81 | 5 days | |
| 14I2.5ISO | 14 | 2.5 | £29.81 | In Stock | |
| 21E1.0ISO | 21 | 1 | £39.62 | In Stock | |
| 21I1.0ISO | 21 | 1 | £39.62 | In Stock | |
| 21E1.5ISO | 21 | 1.5 | £39.62 | In Stock | |
| 21I1.5ISO | 21 | 1.5 | £39.62 | 5 days | |
| 21I1.75ISO | 21 | 1.75 | £39.62 | In Stock | |
| 21E2.0ISO | 21 | 2 | £39.62 | In Stock | |
| 21I2.0ISO | 21 | 2 | £39.62 | In Stock | |
| 21E2.5ISO | 21 | 2.5 | £39.62 | In Stock | |
| 21I2.5ISO | 21 | 2.5 | £39.62 | In Stock | |
| 21E3.0ISO | 21 | 3 | £39.62 | In Stock | |
| 21I3.0ISO | 21 | 3 | £39.62 | In Stock | |
| 21I3.5ISO | 21 | 3.5 | £39.62 | In Stock | |
| 30E1.5ISO | 30 | 1.5 | £54.34 | In Stock | |
| 30I1.5ISO | 30 | 1.5 | £54.34 | 5 days | |
| 30E2.0ISO | 30 | 2 | £54.34 | In Stock | |
| 30I2.0ISO | 30 | 2 | £54.34 | In Stock | |
| 30E3.0ISO | 30 | 3 | £54.34 | In Stock | |
| 30I3.0ISO | 30 | 3 | £54.34 | In Stock | |
| 30E3.5ISO | 30 | 3.5 | £54.34 | In Stock | |
| 30I3.5ISO | 30 | 3.5 | £54.34 | In Stock | |
| 30E4.0ISO | 30 | 4 | £54.34 | 5 days | |
| 30I4.0ISO | 30 | 4 | £54.34 | In Stock | |
| 30I4.5ISO | 30 | 4.5 | £54.34 | In Stock | |
| 30I5.0ISO | 30 | 5 | £54.34 | In Stock | |
| 30I5.5ISO | 30 | 5.5 | £54.34 | In Stock | |
| 40E1.5ISO | 40 | 1.5 | £93.98 | 5 days | |
| 40I1.5ISO | 40 | 1.5 | £93.98 | 5 days | |
| 40E2.0ISO | 40 | 2 | £93.98 | 5 days | |
| 40I2.0ISO | 40 | 2 | £93.98 | 5 days | |
| 40E3.0ISO | 40 | 3 | £93.98 | 5 days | |
| 40I3.0ISO | 40 | 3 | £93.98 | 5 days | |
| 40I3.5ISO | 40 | 3 | £93.98 | 5 days | |
| 40E4.0ISO | 40 | 4 | £93.98 | 5 days | |
| 40I4.0ISO | 40 | 4 | £93.98 | 5 days | |
| 40I4.5ISO | 40 | 4 | £93.98 | 5 days | |
| 40E5.0ISO | 40 | 5 | £93.98 | 5 days | |
| 40I5.0ISO | 40 | 5 | £93.98 | 5 days | |
| 40I5.5ISO | 40 | 5.5 | £93.98 | 5 days | |
| 40E6.0ISO | 40 | 6 | £93.98 | 5 days | |
| 40I6.0ISO | 40 | 6 | £93.98 | In Stock |
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