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Carmex Thread Turning Internal Insert - UN (UNC,UNF,UNEF,UNS) - Right Hand - 16IR20UNBMA
SKU:16IR20UNBMA
The Carmex Thread Turning Internal Insert - UN (UNC, UNF, UNEF, UNS) - Right Hand - 16IR20UNBMA is a precision cutting insert designed for internal threading. Built to handle a wide range of UN s...
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Material Compatibility
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Specification
Download Cutting Data
| Thread Type | Internal |
| Thread Direction | Right Hand |
| Thread Form | UN (UNC UNF UNEF UNS) |
| Pitch | 20 |
| Insert Size | 16 |
| Grade | BMA |
£8.44
Prices shown ex. VAT
In Stock— only 6 left
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The Carmex Thread Turning Internal Insert - UN (UNC, UNF, UNEF, UNS) - Right Hand - 16IR20UNBMA is a precision cutting insert designed for internal threading. Built to handle a wide range of UN standards, it provides a reliable solution for machinists, engineers, and hobbyists working on parts that require clean, accurate internal threads.
These high-quality laydown triangular inserts are recognized worldwide for their versatility. They can accommodate the majority of internal thread standards today, from simple through holes to more demanding features, helping you simplify your tool lineup and keep projects moving.
- Broad UN standards compatibility: Supports UNC, UNF, UNEF, and UNS internal threads with a single insert, simplifying stocking and setup.
- Triangular laydown geometry for stability: The laydown triangular design provides steady cutting engagement and even wear, promoting consistent thread quality and longer tool life.
- Right-hand threading optimization: Specifically engineered for right-hand internal threads, delivering reliable, predictable results across a wide range of applications.
Used in busy production environments or workshop settings, this insert helps streamline internal threading tasks. It enables faster setup, reduces tool-change downtime, and delivers dependable results across multiple UN thread standards, giving you confidence in every part you produce.
| Thread Type | Internal |
| Thread Direction | Right Hand |
| Thread Form | UN (UNC UNF UNEF UNS) |
| Pitch | 20 |
| Insert Size | 16 |
| Grade | BMA |
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.
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Phone requests are handled quickly and without any fuss. The website is easy to use and straightforward to order from. It’s especially helpful that it shows real‑time availability, so we don’t need to call to confirm whether parts will arrive.
Full Range: Carmex Thread Turning Internal Inserts - Unified - Right/Left Hand
View full collection →You are viewing 16IR20UNBMA. Click any other SKU to view its full details.
| Product SKU | Thread Type | Thread Direction | Thread Form | Pitch | Insert Size | Grade | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|---|
| 06IL18UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 18 | 6 | BMA | £9.43 | 5 days | |
| 06IL18UNBXC | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 18 | 6 | BXC | £11.10 | 5 days | |
| 06IL18WBMA | Internal | Left Hand | W (BSW BSF BSP BSB) | 18 | 6 | BMA | £9.43 | 5 days | |
| 06IL20UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 20 | 6 | BMA | £9.43 | In Stock | |
| 06IL20UNBXC | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 20 | 6 | BXC | £11.10 | In Stock | |
| 06IL20WBMA | Internal | Left Hand | W (BSW BSF BSP BSB) | 20 | 6 | BMA | £9.43 | 5 days | |
| 06IL22WBMA | Internal | Left Hand | W (BSW BSF BSP BSB) | 22 | 6 | BMA | £9.43 | 5 days | |
| 06IL24UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 24 | 6 | BMA | £11.14 | 5 days | |
| 06IL24UNBXC | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 24 | 6 | BXC | £11.10 | 5 days | |
| 06IL28UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 28 | 6 | BMA | £9.43 | 5 days | |
| 06IL28UNBXC | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 28 | 6 | BXC | £11.10 | 5 days | |
| 06IL32UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 32 | 6 | BMA | £11.14 | In Stock | |
| 06IL32UNBXC | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 32 | 6 | BXC | £11.10 | 5 days | |
| 06IR18UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 18 | 6 | BMA | £9.28 | In Stock | |
| 06IR18UNBXC | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 18 | 6 | BXC | £9.28 | In Stock | |
| 06IR20UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 20 | 6 | BMA | £9.28 | In Stock | |
| 06IR20UNBXC | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 20 | 6 | BXC | £9.28 | 5 days | |
| 06IR24UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 24 | 6 | BMA | £9.28 | 5 days | |
| 06IR28UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 28 | 6 | BMA | £9.28 | In Stock | |
| 06IR32UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 32 | 6 | BMA | £9.28 | In Stock | |
| 08IL14UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 14 | 8 | BMA | £11.10 | 5 days | |
| 08IL16UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 16 | 8 | BMA | £9.43 | 5 days | |
| 08IL18UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 18 | 8 | BMA | £11.10 | 5 days | |
| 08IL20UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 20 | 8 | BMA | £11.10 | 5 days | |
| 08IL24UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 24 | 8 | BMA | £11.10 | 5 days | |
| 08IL28UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 28 | 8 | BMA | £11.10 | 5 days | |
| 08IL32UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 32 | 8 | BMA | £11.10 | 5 days | |
| 08IR13UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 13 | 8 | BMA | £9.28 | In Stock | |
| 08IR14UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 14 | 8 | BMA | £9.28 | In Stock | |
| 08IR16UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 16 | 8 | BMA | £9.28 | 5 days | |
| 08IR18UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 18 | 8 | BMA | £9.28 | In Stock | |
| 08IR20UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 20 | 8 | BMA | £9.28 | In Stock | |
| 08IR24UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 24 | 8 | BMA | £9.28 | 5 days | |
| 08IR28UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 28 | 8 | BMA | £9.28 | 5 days | |
| 08IR32UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 32 | 8 | BMA | £9.28 | 5 days | |
| 11IL11UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 11 | 11 | BMA | £8.59 | 5 days | |
| 11IL12UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 12 | 11 | BMA | £8.59 | 5 days | |
| 11IL13UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 13 | 11 | BMA | £8.44 | 5 days | |
| 11IL14UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 14 | 11 | BMA | £8.59 | 5 days | |
| 11IL16UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 16 | 11 | BMA | £8.44 | In Stock | |
| 11IL18UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 18 | 11 | BMA | £8.44 | In Stock | |
| 11IL20UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 20 | 11 | BMA | £8.59 | 5 days | |
| 11IL24UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 24 | 11 | BMA | £8.59 | In Stock | |
| 11IL27UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 27 | 11 | BMA | £8.59 | 5 days | |
| 11IL28UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 28 | 11 | BMA | £8.44 | 5 days | |
| 11IL32UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 32 | 11 | BMA | £8.59 | 5 days | |
| 11IL36UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 36 | 11 | BMA | £11.16 | 5 days | |
| 11IL40UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 40 | 11 | BMA | £11.16 | 5 days | |
| 11IL44UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 44 | 11 | BMA | £11.16 | 5 days | |
| 11IL48UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 48 | 11 | BMA | £11.16 | 5 days | |
| 11IL56UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 56 | 11 | BMA | £11.16 | 5 days | |
| 11IL64UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 64 | 11 | BMA | £11.16 | 5 days | |
| 11IL72UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 72 | 11 | BMA | £11.16 | 5 days | |
| 11IR11UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 11 | 11 | BMA | £8.44 | 5 days | |
| 11IR12UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 12 | 11 | BMA | £8.44 | In Stock | |
| 11IR13UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 13 | 11 | BMA | £8.44 | In Stock | |
| 11IR14UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 14 | 11 | BMA | £8.44 | 5 days | |
| 11IR16UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 16 | 11 | BMA | £8.44 | In Stock | |
| 11IR18UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 18 | 11 | BMA | £8.44 | 5 days | |
| 11IR20UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 20 | 11 | BMA | £8.44 | 5 days | |
| 11IR24UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 24 | 11 | BMA | £8.44 | In Stock | |
| 11IR27UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 27 | 11 | BMA | £8.44 | In Stock | |
| 11IR28UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 28 | 11 | BMA | £8.44 | In Stock | |
| 11IR32UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 32 | 11 | BMA | £8.44 | In Stock | |
| 11IR36UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 36 | 11 | BMA | £10.94 | In Stock | |
| 11IR40UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 40 | 11 | BMA | £8.44 | In Stock | |
| 11IR44UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 44 | 11 | BMA | £11.16 | 5 days | |
| 11IR48UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 48 | 11 | BMA | £10.94 | 5 days | |
| 11IR56UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 56 | 11 | BMA | £11.16 | 5 days | |
| 11IR64UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 64 | 11 | BMA | £11.16 | 5 days | |
| 11IR72UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 72 | 11 | BMA | £11.16 | 5 days | |
| 16IL10UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 10 | 16 | BMA | £8.44 | 5 days | |
| 16IL11.5UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 11.5 | 16 | BMA | £8.59 | 5 days | |
| 16IL11UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 11 | 16 | BMA | £8.44 | 5 days | |
| 16IL12UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 12 | 16 | BMA | £8.44 | 5 days | |
| 16IL13UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 13 | 16 | BMA | £8.44 | 5 days | |
| 16IL14UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 14 | 16 | BMA | £8.44 | 5 days | |
| 16IL16UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 16 | 16 | BMA | £8.44 | 5 days | |
| 16IL18UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 18 | 16 | BMA | £8.44 | 5 days | |
| 16IL20UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 20 | 16 | BMA | £8.44 | 5 days | |
| 16IL24UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 24 | 16 | BMA | £8.59 | In Stock | |
| 16IL27UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 27 | 16 | BMA | £8.59 | 5 days | |
| 16IL28UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 28 | 16 | BMA | £8.59 | 5 days | |
| 16IL32UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 32 | 16 | BMA | £8.59 | 5 days | |
| 16IL36UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 36 | 16 | BMA | £11.16 | 5 days | |
| 16IL40UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 40 | 16 | BMA | £11.16 | 5 days | |
| 16IL44UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 44 | 16 | BMA | £11.16 | 5 days | |
| 16IL48UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 48 | 16 | BMA | £11.16 | 5 days | |
| 16IL56UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 56 | 16 | BMA | £11.16 | 5 days | |
| 16IL64UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 64 | 16 | BMA | £11.16 | 5 days | |
| 16IL72UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 72 | 16 | BMA | £11.16 | 5 days | |
| 16IL8UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 8 | 16 | BMA | £8.44 | In Stock | |
| 16IL9UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 9 | 16 | BMA | £8.44 | 5 days | |
| 16IR10UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 10 | 16 | BMA | £8.44 | In Stock | |
| 16IR11.5UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 11.5 | 16 | BMA | £8.44 | In Stock | |
| 16IR11UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 11 | 16 | BMA | £8.44 | In Stock | |
| 16IR12UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 12 | 16 | BMA | £8.44 | In Stock | |
| 16IR13UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 13 | 16 | BMA | £8.44 | In Stock | |
| 16IR14UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 14 | 16 | BMA | £8.44 | In Stock | |
| 16IR16UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 16 | 16 | BMA | £8.44 | 5 days | |
| 16IR18UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 18 | 16 | BMA | £8.44 | In Stock | |
| 16IR20UNBMA Viewing | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 20 | 16 | BMA | £8.44 | In Stock | |
| 16IR24UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 24 | 16 | BMA | £8.44 | In Stock | |
| 16IR27UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 27 | 16 | BMA | £8.44 | In Stock | |
| 16IR28UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 28 | 16 | BMA | £8.44 | In Stock | |
| 16IR32UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 32 | 16 | BMA | £8.44 | In Stock | |
| 16IR36UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 36 | 16 | BMA | £10.94 | In Stock | |
| 16IR40UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 40 | 16 | BMA | £10.94 | In Stock | |
| 16IR44UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 44 | 16 | BMA | £10.94 | 5 days | |
| 16IR48UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 48 | 16 | BMA | £10.94 | 5 days | |
| 16IR56UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 56 | 16 | BMA | £10.94 | 5 days | |
| 16IR64UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 64 | 16 | BMA | £10.94 | 5 days | |
| 16IR72UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 72 | 16 | BMA | £10.94 | 5 days | |
| 16IR8UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 8 | 16 | BMA | £8.44 | In Stock | |
| 16IR9UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 9 | 16 | BMA | £8.44 | In Stock | |
| 22IL5UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 5 | 22 | BMA | £12.59 | 5 days | |
| 22IL6UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 6 | 22 | BMA | £12.59 | 5 days | |
| 22IL7UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 7 | 22 | BMA | £12.59 | 5 days | |
| 22IR5UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 5 | 22 | BMA | £12.38 | 5 days | |
| 22IR6UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 6 | 22 | BMA | £12.38 | In Stock | |
| 22IR7UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 7 | 22 | BMA | £12.38 | In Stock | |
| 27IL4.5UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 4.5 | 27 | BMA | £17.79 | 5 days | |
| 27IL4UNBMA | Internal | Left Hand | UN (UNC UNF UNEF UNS) | 4 | 27 | BMA | £17.79 | 5 days | |
| 27IR4.5UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 4.5 | 27 | BMA | £17.46 | 5 days | |
| 27IR4UNBMA | Internal | Right Hand | UN (UNC UNF UNEF UNS) | 4 | 27 | BMA | £17.46 | 5 days |
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