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Carmex Carbide Threading Insert - Unified - TiAlN Coated - 40I4.5UN

SKU:40I4.5UN

The Carmex Carbide Threading Insert – Unified with TiAlN coating delivers versatile, precision threading for a wide range of common profiles. Designed for machinists and shops that need a reliable... Read more ↓
P
M
K
N
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ApplicationThreading
Thread FormUN
Internal or ExternalInternal
Insert Size40
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£93.98
Prices shown ex. VAT
5 days estimated lead time — subject to availability
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Free delivery over £50 ex VAT
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14-day returns
30+ years expertise
Klarna
Pay in 3 interest-free instalments. No extra cost if paid on time. 18+ only.
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01732 887334
Mon – Thurs 8:30 – 17:30 · Fri 8:30 – 16:30

Description

The Carmex Carbide Threading Insert – Unified with TiAlN coating delivers versatile, precision threading for a wide range of common profiles. Designed for machinists and shops that need a reliable, single solution for both internal and external threads.

  • Coating: TiAlN-coated carbide for improved wear resistance and sustained cutting performance in demanding threading operations.
  • Material: Solid carbide insert offering rigidity, stability, and consistent thread accuracy across profiles.
  • Thread profiles covered: Unified inserts that span all common thread profiles, simplifying tool selection for most jobs (with noted exceptions).
  • Length options: Five lengths available, from 12 mm to 40 mm, to fit various machines and applications.
  • Cutting edges: Double-sided design with two cutting edges, extending insert life (exceptions apply for BSPT/NPT/NPTF/American Buttress/API RD).
  • Internal/External capability: Many profiles can be machined with the same insert for both internal and external threads, reducing setup time (ISO/UN/NPSM/UNJ/Acme have specific considerations).
  • Pitch range: Depending on length, supports pitches from 0.5 mm (32 TPI) up to 6.0 mm (4 TPI), accommodating a wide range of thread standards.

With the TiAlN-coated Carmex Unified threading inserts, you gain reliable performance across diverse thread requirements, fewer tool changes, and predictable results. The double-edged design lets you maximize uptime by flipping to a fresh edge, while the five length options let you tailor the insert to your machine clearance and the specific thread you’re producing—from fine 0.5 mm pitches to coarse 6.0 mm threads. This makes the insert an excellent choice for professional workshops, production environments, and any operation that prioritizes consistent thread quality and efficiency.

Part Numbers

Protool Part Number
40I4.5UN
Brand
Carmex
Category
Thread Mill
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 Carbide Threading Inserts - Unified - TiAlN Coated

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You are viewing 40I4.5UN. Click any other SKU to view its full details.

Product SKUInsert SizePitchPriceStock Order
12I16UN 1216£29.81 In Stock
12I18UN 1218£29.81 5 days
12I20UN 1220£29.81 In Stock
12I24UN 1224£29.81 In Stock
12I28UN 1228£29.81 In Stock
12I32UN 1232£29.81 In Stock
14E10UN 1410£22.91 5 days
14E11UN 1411£22.91 5 days
14E12UN 1412£29.81 In Stock
14E14UN 1414£29.81 In Stock
14E16UN 1416£29.81 In Stock
14E18UN 1418£29.81 5 days
14E20UN 1420£29.81 In Stock
14E24UN 1424£29.81 In Stock
14E28UN 1428£29.81 In Stock
14E32UN 1432£29.81 5 days
14I10UN 1410£29.81 In Stock
14I11UN 1411£29.81 In Stock
14I12UN 1412£29.81 In Stock
14I14UN 1414£29.81 5 days
14I16UN 1416£29.81 In Stock
14I18UN 1418£29.81 In Stock
14I20UN 1420£29.81 In Stock
14I24UN 1424£29.81 In Stock
14I27UN 1427£29.81 In Stock
14I28UN 1428£29.81 In Stock
14I32UN 1432£29.81 In Stock
14I9UN 149£29.81 In Stock
21E10UN 2110£39.62 5 days
21E11UN 2111£30.44 5 days
21E12UN 2112£39.62 5 days
21E14UN 2114£39.62 5 days
21E16UN 2116£39.62 In Stock
21E18UN 2118£39.62 In Stock
21E20UN 2120£39.62 In Stock
21E24UN 2124£39.62 In Stock
21I10UN 2110£39.62 In Stock
21I12UN 2112£39.62 5 days
21I14UN 2114£39.62 In Stock
21I16UN 2116£39.62 In Stock
21I18UN 2118£39.62 In Stock
21I20UN 2120£39.62 In Stock
21I24UN 2124£39.62 In Stock
21I7UN 217£39.62 In Stock
21I8UN 218£39.62 In Stock
30E10UN 3010£54.34 5 days
30E12UN 3012£54.34 5 days
30E14UN 3014£54.34 5 days
30E16UN 3016£54.34 5 days
30E18UN 3018£54.34 5 days
30E20UN 3020£54.34 5 days
30E6UN 306£54.34 5 days
30E8UN 308£54.34 5 days
30I10UN 3010£54.34 5 days
30I12UN 3012£54.34 In Stock
30I14UN 3014£54.34 5 days
30I16UN 3016£54.34 5 days
30I18UN 3018£54.34 In Stock
30I20UN 3020£54.34 5 days
30I5UN 305£54.34 In Stock
30I6UN 306£54.34 5 days
30I8UN 308£54.34 5 days
40E10UN 4010£93.98 5 days
40E12UN 4012£93.98 5 days
40E14UN 4014£93.98 5 days
40E16UN 4016£93.98 5 days
40E6UN 406£93.98 5 days
40E8UN 408£93.98 5 days
40I10UN 4010£93.98 5 days
40I12UN 4012£93.98 5 days
40I14UN 4014£93.98 5 days
40I16UN 4016£93.98 5 days
40I4.5UN Viewing404.5£93.98 5 days
40I4UN 404£93.98 5 days
40I6UN 406£93.98 5 days
40I8UN 408£93.98 5 days

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