Please log in here to access all benefits, including promotional discounts and faster checkouts.

Carmex Thread Turning Internal Insert - UNJ (UNJC UNJF UNJEF UNJS) - Left Hand - 11IL20UNJBMA

Carmex Thread Turning Internal Insert - UNJ (UNJC UNJF UNJEF UNJS) - Left Hand - 11IL20UNJBMA

SKU:11IL20UNJBMA

Carmex Thread Turning Internal Insert - UNJ (UNJC UNJF UNJEF UNJS) - Left Hand - 11IL20UNJBMA is a versatile internal threading insert designed for engineers, machinists, and shop floor teams who... Read more ↓
P
M
K
S
H
Thread TypeInternal
Thread DirectionLeft Hand
Thread FormUNJ (UNJC UNJF UNJEF UNJS)
Pitch20
Insert Size11
GradeBMA
Download Cutting Data
£10.72
Prices shown ex. VAT
5 days estimated lead time — subject to availability
View Other Sizes →
Free delivery over £50 ex VAT
Secure checkout
14-day returns
30+ years expertise
Klarna
Pay in 3 interest-free instalments. No extra cost if paid on time. 18+ only.
Learn more about Klarna
Speak to our team
01732 887334
Mon – Thurs 8:30 – 17:30 · Fri 8:30 – 16:30

Carmex Thread Turning Internal Insert - UNJ (UNJC UNJF UNJEF UNJS) - Left Hand - 11IL20UNJBMA is a versatile internal threading insert designed for engineers, machinists, and shop floor teams who need dependable performance across UNJ thread standards. This left-hand LH variant is built to deliver consistent results in internal threading tasks, helping you streamline setups and complete jobs with confidence.

These laydown triangular inserts are engineered to cover the majority of thread standards in today’s workshops, reducing the need for multiple tools and simplifying inventory. Whether you’re tackling basic prototypes or finishing demanding components, this insert supports efficient, repeatable thread turning across a wide range of applications.

  • Broad UNJ compatibility: Designed to cover UNJC, UNJF, UNJEF, and UNJS internal thread profiles with a single LH insert, helping you reduce tool changes and keep production flowing.
  • Left-Hand threading efficiency: Optimized for left-hand internal threads, providing stable cutting action and predictable results for clean, accurate thread starts.
  • Durable laydown triangular geometry: Built for longevity and consistent performance across basic to demanding applications, resisting wear to preserve thread quality over many cycles.

This insert helps you simplify workflows, minimize downtime, and deliver reliable, repeatable thread quality. With its LH orientation and broad UNJ compatibility, you can complete internal threads with greater confidence and efficiency, aligning with tight tolerances and high-standard finishes.

Thread Type Internal
Thread Direction Left Hand
Thread Form UNJ (UNJC UNJF UNJEF UNJS)
Pitch 20
Insert Size 11
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.

★★★★★
Nice experience staff are very helpful and interested...
Staff are very helpful and interested in providing a good service making us the customer feel valued.
Bill
★★★★★
first place we look
honest about stock and prices are competitive.
Phil
★★★★★
Polite and helpful
Staff are very helpful and polite.Goods that were in stock were dispatched same day and back orders were quick in coming through .
Graham
★★★★★
Buying experience
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.
Jeremy

Full Range: Carmex Thread Turning Internal Inserts - UNJ - Right/Left Hand

View full collection →

You are viewing 11IL20UNJBMA. Click any other SKU to view its full details.

Product SKUThread TypeThread DirectionThread FormPitchInsert SizeGradePriceStock Order
11IL14UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)1411BMA£10.90 5 days
11IL16UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)1611BMA£10.90 5 days
11IL18UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)1811BMA£10.72 5 days
11IL20UNJBMA ViewingInternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)2011BMA£10.72 5 days
11IL24UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)2411BMA£10.90 5 days
11IL28UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)2811BMA£10.90 5 days
11IL32UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)3211BMA£10.90 5 days
11IL36UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)3611BMA£14.18 5 days
11IL40UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)4011BMA£14.18 5 days
11IL44UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)4411BMA£14.18 5 days
11IL48UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)4811BMA£14.18 5 days
11IR14UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)1411BMA£10.72 In Stock
11IR16UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)1611BMA£10.72 In Stock
11IR18UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)1811BMA£10.72 In Stock
11IR20UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)2011BMA£10.72 In Stock
11IR24UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)2411BMA£10.72 In Stock
11IR28UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)2811BMA£10.72 In Stock
11IR32UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)3211BMA£10.72 In Stock
11IR36UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)3611BMA£13.96 In Stock
11IR40UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)4011BMA£13.96 In Stock
11IR44UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)4411BMA£13.96 In Stock
11IR48UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)4811BMA£13.96 In Stock
16IL10UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)1016BMA£10.90 5 days
16IL11UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)1116BMA£10.90 5 days
16IL12UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)1216BMA£10.72 5 days
16IL13UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)1316BMA£10.90 5 days
16IL14UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)1416BMA£10.90 5 days
16IL16UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)1616BMA£10.72 5 days
16IL18UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)1816BMA£10.72 5 days
16IL20UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)2016BMA£10.90 5 days
16IL24UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)2416BMA£10.90 5 days
16IL28UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)2816BMA£10.90 5 days
16IL32UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)3216BMA£10.90 5 days
16IL36UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)3616BMA£14.18 5 days
16IL40UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)4016BMA£14.18 5 days
16IL44UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)4416BMA£14.18 5 days
16IL48UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)4816BMA£14.18 5 days
16IL8UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)816BMA£10.72 5 days
16IL9UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)916BMA£10.90 5 days
16IR10UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)1016BMA£10.90 5 days
16IR11UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)1116BMA£10.90 5 days
16IR12UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)1216BMA£10.72 In Stock
16IR13UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)1316BMA£10.90 5 days
16IR14UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)1416BMA£10.72 In Stock
16IR16UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)1616BMA£10.72 In Stock
16IR18UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)1816BMA£10.72 In Stock
16IR20UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)2016BMA£10.72 In Stock
16IR24UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)2416BMA£10.72 In Stock
16IR28UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)2816BMA£10.72 In Stock
16IR32UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)3216BMA£10.72 In Stock
16IR36UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)3616BMA£13.96 In Stock
16IR40UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)4016BMA£13.96 In Stock
16IR44UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)4416BMA£13.96 In Stock
16IR48UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)4816BMA£13.96 In Stock
16IR8UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)816BMA£10.72 In Stock
16IR9UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)916BMA£10.90 5 days