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16IL0.35ISOK20 - Carmex Thread Turning Internal Insert - Metric - Left Hand
| Thread Type | Internal |
| Thread Direction | Left Hand |
| Thread Form | Metric |
| Pitch | 0.35 |
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Carmex Thread Turning Internal Insert - Metric - Left Hand - 16IL0.35ISOK20 is a high-performance, laydown triangular insert engineered for internal thread turning on metric left‑hand threads. It sits at the core of Carmex’s trusted thread turning range and is designed to cover a broad spectrum of thread standards with a single, versatile tool.
Whether you’re an engineer, a buyer, a tradesperson, or a hobbyist, this insert delivers reliable, repeatable threads across a wide range of applications—from straightforward cuts to more demanding profiling tasks.
- Broad thread compatibility: Designed to cover the majority of metric left‑hand thread standards, reducing the need for multiple inserts and simplifying inventory management.
- Stable, triangular laydown geometry: Precisely formed geometry ensures secure seating and smooth cutting action for consistent thread quality and reduced chatter.
- Versatility for basic to demanding applications: One insert handles simple and challenging threading tasks with reliable performance across materials and thread profiles.
This insert helps you streamline threading work: it supports a wide range of metric left‑hand tasks with confidence, minimizes tool changes, and delivers predictable results you can rely on across your projects.
Part Numbers
- Protool Part Number
- 16IL0.35ISOK20
- 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.



