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

Carmex Thread Turning Internal Insert - UNJ (UNJC UNJF UNJEF UNJS) - Right Hand - 11IR20UNJBMA

Carmex Thread Turning Internal Insert - UNJ (UNJC UNJF UNJEF UNJS) - Right Hand - 11IR20UNJBMA

SKU:11IR20UNJBMA

Carmex Thread Turning Internal Insert — UNJ (UNJC UNJF UNJEF UNJS) — Right Hand — 11IR20UNJBMA is part of our industry-leading range of thread turning inserts, recognized worldwide for reliabilit... Read more ↓
P
M
K
S
H
Thread TypeInternal
Thread DirectionRight Hand
Thread FormUNJ (UNJC UNJF UNJEF UNJS)
Pitch20
View all specifications ↓
Download Cutting Data
£13.40
Prices shown ex. VAT
In Stock— only 5 left
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

Description

Carmex Thread Turning Internal Insert — UNJ (UNJC UNJF UNJEF UNJS) — Right Hand — 11IR20UNJBMA is part of our industry-leading range of thread turning inserts, recognized worldwide for reliability and broad compatibility. This laydown triangular insert is designed to handle the majority of UNJ thread standards in a single tool, simplifying inventory and setup while delivering consistent results.

Ideal for engineers, operators, and technicians across maintenance, fabrication, and production environments, it covers everything from basic threading tasks to the most demanding applications. The right-hand orientation and universal UNJ coverage let you tackle threaded holes with confidence, wherever your workflow requires it.

  • Broad UNJ compatibility: Works with UNJC, UNJF, UNJEF, and UNJS internal thread standards, reducing tool changes and keeping jobs moving quickly.
  • Triangular laydown geometry for stable cutting: Provides smooth engagement and consistent thread form across a range of materials and depths, helping reduce chatter and rework.
  • Right-hand orientation for standard setups: Designed to integrate seamlessly with common machining configurations, delivering predictable toolpaths and reliable finishes.

This internal insert is engineered to deliver dependable performance from first cut to final thread, supporting faster cycle times, fewer adjustments, and durable, repeatable results across a wide spectrum of threading tasks.

Part Numbers

Protool Part Number
11IR20UNJBMA
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.

Ask our technical team about this tool

Not sure if this is the right tool for your job? Ask us about speeds and feeds, material suitability, holders or alternatives — 30+ years of machining experience on the other end.

Prefer to talk? Call 01732 887334 — Mon–Thurs 8:30–17:30, Fri 8:30–16:30.

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

View full collection →

You are viewing 11IR20UNJBMA. Click any other SKU to view its full details.

Product SKUThread TypeThread DirectionThread FormPitchInsert SizeGradePriceStock Order
11IL14UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)1411BMA£10.28 5 days
11IL16UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)1611BMA£10.28 5 days
11IL18UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)1811BMA£13.40 5 days
11IL20UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)2011BMA£13.40 5 days
11IL24UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)2411BMA£10.28 5 days
11IL28UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)2811BMA£10.28 5 days
11IL32UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)3211BMA£10.28 5 days
11IL36UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)3611BMA£13.38 5 days
11IL40UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)4011BMA£13.38 5 days
11IL44UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)4411BMA£13.38 5 days
11IL48UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)4811BMA£13.38 5 days
11IR14UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)1411BMA£13.40 In Stock
11IR16UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)1611BMA£13.40 In Stock
11IR18UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)1811BMA£13.40 In Stock
11IR20UNJBMA ViewingInternalRight HandUNJ (UNJC UNJF UNJEF UNJS)2011BMA£13.40 In Stock
11IR24UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)2411BMA£13.40 In Stock
11IR28UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)2811BMA£13.40 In Stock
11IR32UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)3211BMA£13.40 In Stock
11IR36UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)3611BMA£17.45 In Stock
11IR40UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)4011BMA£17.45 In Stock
11IR44UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)4411BMA£17.45 In Stock
11IR48UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)4811BMA£17.45 In Stock
16IL10UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)1016BMA£9.25 5 days
16IL11UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)1116BMA£9.25 5 days
16IL12UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)1216BMA£12.06 5 days
16IL13UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)1316BMA£9.25 5 days
16IL14UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)1416BMA£9.25 5 days
16IL16UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)1616BMA£12.06 5 days
16IL18UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)1816BMA£12.06 5 days
16IL20UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)2016BMA£9.25 5 days
16IL24UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)2416BMA£9.25 5 days
16IL28UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)2816BMA£9.25 5 days
16IL32UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)3216BMA£9.25 5 days
16IL36UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)3616BMA£12.04 5 days
16IL40UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)4016BMA£12.04 5 days
16IL44UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)4416BMA£12.04 5 days
16IL48UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)4816BMA£12.04 5 days
16IL8UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)816BMA£12.06 5 days
16IL9UNJBMA InternalLeft HandUNJ (UNJC UNJF UNJEF UNJS)916BMA£9.25 5 days
16IR10UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)1016BMA£9.25 5 days
16IR11UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)1116BMA£9.25 5 days
16IR12UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)1216BMA£12.06 In Stock
16IR13UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)1316BMA£9.25 5 days
16IR14UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)1416BMA£12.06 In Stock
16IR16UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)1616BMA£12.06 In Stock
16IR18UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)1816BMA£12.06 In Stock
16IR20UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)2016BMA£12.06 In Stock
16IR24UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)2416BMA£12.06 In Stock
16IR28UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)2816BMA£12.06 In Stock
16IR32UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)3216BMA£12.06 In Stock
16IR36UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)3616BMA£15.71 In Stock
16IR40UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)4016BMA£15.71 In Stock
16IR44UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)4416BMA£15.71 In Stock
16IR48UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)4816BMA£15.71 In Stock
16IR8UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)816BMA£12.06 In Stock
16IR9UNJBMA InternalRight HandUNJ (UNJC UNJF UNJEF UNJS)916BMA£9.25 5 days

Complete Your Project

Tooling and consumables that work with this product.
All 6 →