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Carmex Thread Turning Internal Insert - UN (UNC,UNF,UNEF,UNS) - Right Hand - 16IR44UNK20

16IR44UNK20 - Carmex Thread Turning Internal Insert - UN (UNC,UNF,UNEF,UNS) - Right Hand

SKU:16IR44UNK20

Carmex Thread Turning Internal Insert is a versatile laydown triangular insert designed for internal threading across UNC, UNF, UNEF, and UNS standards. It’s built to perform reliably across many... Read more ↓
N
S
Thread TypeInternal
Thread DirectionRight Hand
Thread FormUN (UNC UNF UNEF UNS)
Pitch44
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£10.01
per item · pack of 10
Prices shown ex. VAT
5 days estimated lead time — subject to availability
Sold in packs of 10
Free delivery over £50 ex VAT
Secure checkout
14-day returns
30+ years expertise
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01732 887334
Mon – Thurs 8:30 – 17:30 · Fri 8:30 – 16:30

Description

Carmex Thread Turning Internal Insert is a versatile laydown triangular insert designed for internal threading across UNC, UNF, UNEF, and UNS standards. It’s built to perform reliably across many applications, from simple to demanding, with a Right Hand version ready to tackle right-hand threads. Part code: 16IR44UNK20.

Its laydown triangular geometry supports stable seating, smooth chip flow, and predictable results when turning internal threads, helping you reduce setup time and tool changes.

  • Broad UN thread compatibility: Enables internal threading for UNC, UNF, UNEF, and UNS with a single insert, reducing tool changes and inventory.
  • Right Hand, laydown triangular design: Optimized for right-hand threads and straightforward integration with standard tooling, delivering stable seating and clean thread formation.
  • Proven performance from basic to the most demanding applications: Built to handle a wide range of threading tasks with consistent results, reducing rework and downtime.

Together, this insert helps you streamline internal threading work by covering multiple thread standards in one tool, minimizing tool changes and ramping up productivity. The right-hand orientation and laydown geometry deliver predictable cut quality, fast setup, and reliable results across a variety of materials and part geometries, helping you improve workflow, reduce waste, and achieve precise, repeatable threads every time.

Part Numbers

Protool Part Number
16IR44UNK20
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.

Complete Your Project

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