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16IR28WK20 - Carmex Thread Turning Internal Insert - W (BSW BSF BSP BSB) - Right Hand
| Thread Type | Internal |
| Thread Direction | Right Hand |
| Thread Form | W (BSW BSF BSP BSB) |
| Pitch | 28 |
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Carmex Thread Turning Internal Insert – Right Hand – 16IR28WK20 is a precision internal threading insert designed for tough, real-world machining tasks. The compact, laydown triangular insert covers the major thread standards—BSW, BSF, BSP, and BSB—allowing you to tackle a wide range of projects with a single versatile tool. It features a central bore for secure mounting, ensuring accurate, repeatable alignment as you cut.
- Broad thread-standard compatibility: Designed to cover BSW, BSF, BSP, and BSB internal thread standards, reducing tool changes and simplifying inventory.
- Triangular laydown geometry for stability and accuracy: The laydown form provides robust, stable engagement for smooth, consistent threads across a wide range of applications.
- Right-hand orientation for easy integration: Configured for right-handed threads to align with common machining practices, making setup quick and predictable in both CNC and manual operations.
The Carmex Thread Turning Internal Insert delivers a reliable, versatile solution that helps you complete internal threads with confidence. Its broad compatibility and stable cutting geometry support faster cycles, fewer reworks, and consistent results across a variety of materials and production demands.
Part Numbers
- Protool Part Number
- 16IR28WK20
- 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.



