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

Carmex Thread Turning External Insert - UNJ (UNJC UNJF UNJEF UNJS) - Left Hand - 11EL40UNJBMA

Carmex Thread Turning External Insert - UNJ (UNJC UNJF UNJEF UNJS) - Left Hand - 11EL40UNJBMA

SKU:11EL40UNJBMA

Carmex Thread Turning External Insert - UNJ is a left-hand, external threading insert designed for the UNJ family. It delivers reliable, consistent cuts across UNJC, UNJF, UNJEF, and UNJS standar... Read more ↓
P
M
K
S
H
Thread TypeExternal
Thread DirectionLeft Hand
Thread FormUNJ (UNJC UNJF UNJEF UNJS)
Pitch40
Insert Size11
GradeBMA
Download Cutting Data
£14.18
Prices shown ex. VAT
5 days estimated lead time — subject to availability
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 External Insert - UNJ is a left-hand, external threading insert designed for the UNJ family. It delivers reliable, consistent cuts across UNJC, UNJF, UNJEF, and UNJS standards, making it well-suited for engineers, machinists, and production environments.

  • Broad UNJ Standards Coverage: Compatible with UNJC, UNJF, UNJEF, and UNJS external threads, with left-hand orientation to support common turning setups.
  • Laydown Triangular Design: Optimizes cutting action, improves chip control, and promotes stable engagement for consistent thread forms across UNJ profiles.
  • Industry-leading Quality and Reliability: Part of Carmex's globally recognized range, built to handle both basic and demanding applications with dependable performance.

This insert helps you streamline threading work by covering multiple UNJ standards with a single tool form, delivering consistent thread quality and reliable results across jobs. Its proven geometry supports stable cutting, predictable wear, and long tool life, helping your shop run more efficiently with fewer interruptions.

Thread Type External
Thread Direction Left Hand
Thread Form UNJ (UNJC UNJF UNJEF UNJS)
Pitch 40
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