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11IL1.25ISOK20 - Carmex Thread Turning Internal Insert - Metric - Left Hand
| Thread Type | Internal |
| Thread Direction | Left Hand |
| Thread Form | Metric |
| Pitch | 1.25 |
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Carmex Thread Turning Internal Insert is a metric, left-hand internal threading insert designed to handle a wide range of thread standards. Its laydown triangular geometry is built to deliver reliable internal threading performance, making it a practical choice for shops that need versatility and consistent results across various tasks.
This insert is ideal for engineers, machinists, and technicians who work on threaded features—from basic applications to the most demanding ones. Its design supports quick setup and dependable results, enabling smoother production workflows with fewer tool changes.
- Broad thread-standard compatibility: Works with the majority of common thread standards, reducing the need for multiple tools and speeding up setup and changeovers.
- Triangular laydown design for stable, smooth threading: The geometry promotes steady engagement inside the bore, helping produce clean, accurate thread forms with minimal chatter.
- Durable, reliable performance across applications: Engineered to deliver repeatable results from simple tasks to tougher jobs, supporting consistent quality and lower rework.
By choosing Carmex Thread Turning Internal Insert, you simplify your threading workflow with dependable performance, faster cycles, and consistent results that keep parts moving through production with confidence.
Part Numbers
- Protool Part Number
- 11IL1.25ISOK20
- Brand
- Carmex
- Category
- Thread Turning
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.



