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16EL16WK20 - Carmex Thread Turning External Insert - W (BSW BSF BSP BSB) - Left Hand
| Thread Type | External |
| Thread Direction | Left Hand |
| Thread Form | W (BSW BSF BSP BSB) |
| Pitch | 16 |
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Carmex Thread Turning External Insert - W (BSW BSF BSP BSB) - Left Hand - 16EL16WK20 is a precision external thread turning insert designed to cover a broad range of thread standards. It belongs to Carmex’s industry-leading range of laydown triangular inserts, providing dependable performance across many common threading tasks.
This left-hand oriented insert is suitable for a wide variety of projects—from routine production work to more demanding threading tasks. It enables you to achieve consistent thread profiles across BSW, BSF, BSP, and BSB standards with fewer tool changes and streamlined setup.
- Broad thread-standard compatibility (BSW/BSF/BSP/BSB): Covers the majority of common thread forms, reducing the need for multiple tools and simplifying inventory.
- Laydown triangular geometry for stable, clean cuts: The geometry provides solid support during cutting, delivering consistent thread profiles and a smooth surface finish.
- Left-hand threading design: Specifically optimized for left-hand threads, enabling reliable performance across a range of applications from basic to demanding tasks.
Whether you’re manufacturing fasteners or performing repair work, this Carmex insert helps you complete external threading tasks more efficiently—delivering accurate, repeatable results across simple to challenging jobs with a straightforward setup that keeps your workflow moving.
Part Numbers
- Protool Part Number
- 16EL16WK20
- 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.



