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16ER1.75ISOK20 - Carmex Thread Turning External Insert - Metric - Right Hand
| Thread Type | External |
| Thread Direction | Right Hand |
| Thread Form | Metric |
| Pitch | 1.75 |
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Carmex Thread Turning External Insert, Metric - Right Hand - 16ER1.75ISOK20, is a versatile external threading insert designed for metric right-hand threads. As part of Carmex’s industry-leading range, this laydown triangular insert is built to cover the majority of thread standards used in today’s machining environments. It’s the practical choice for job shops, maintenance teams, and workshops that need reliable, consistent thread cutting from routine to demanding tasks.
These high-quality laydown triangular inserts are designed to handle a wide range of threading tasks—from routine to the most demanding ones—delivering dependable performance and long service life.
- Wide thread standards compatibility: Covers the majority of thread standards used today, reducing the need to stock multiple inserts and minimizing tool changes.
- Laydown geometry for stable, precise cuts: Triangular laydown design promotes stable engagement and consistent thread profiles across a variety of materials and forms.
- Durable design for demanding applications: Built to maintain precision and reliable performance from basic projects to high-demand tasks, helping reduce scrap and downtime.
Using this external insert helps streamline threading workflows, deliver consistent thread quality, and improve overall productivity. It supports faster turnaround, fewer reworks, and reliable results across a wide range of threading tasks.
Part Numbers
- Protool Part Number
- 16ER1.75ISOK20
- 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.



