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Carmex Carbide Tiny Tool - Threading - MIL - UN (UNC,UNF,UNEF,UNS) - K20 Grade - 5mm Minimum Diameter x 18mm Reach (Left Hand)

Carmex Carbide Tiny Tool - Threading - MIL - UN (UNC,UNF,UNEF,UNS) - K20 Grade - 5mm Minimum Diameter x 18mm Reach (Left Hand)

SKU:MIL5L1820UNK20

The Carmex Carbide Tiny Tool is a precision threading tool designed for small-diameter parts. Featuring a full-profile UN 60° thread form (MIL), it delivers accurate UNC, UNF, UNEF and UNS threads... Read more ↓
M
K
N
S
ApplicationThreading (MIL)
Thread FormUN (UNC UNF UNEF UNS)
Pitch or Pitch Range20
Minimum Diameter5
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£24.18
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
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01732 887334
Mon – Thurs 8:30 – 17:30 · Fri 8:30 – 16:30

Description

The Carmex Carbide Tiny Tool is a precision threading tool designed for small-diameter parts. Featuring a full-profile UN 60° thread form (MIL), it delivers accurate UNC, UNF, UNEF and UNS threads with minimal finishing. This left-handed version is optimized for operations where left-handed threads are required, offering reliable results in a compact footprint.

Machined from premium carbide, the tool combines exceptional hardness, wear resistance, and long tool life. With a 5 mm minimum diameter and an 18 mm reach, it fits into tight spaces and short-reach applications, and its broad machine compatibility makes it a versatile choice for engineers, machinists, and hobbyists alike.

  • Full-profile UN 60° threading (MIL): Achieve precise UNC/UNF/UNEF/UNS threads on tiny parts with consistent geometry and minimal finishing passes, improving first-pass fit and reducing rework.
  • Premium carbide for durability: Hard, wear-resistant cutting edge delivers long tool life and maintains thread tolerances even in tougher materials.
  • Compact 5 mm minimum diameter x 18 mm reach, left-hand design: Access confined features and perform left-handed threads without repositioning the workpiece, boosting workflow efficiency on small components.

With its combination of precise UN 60° threading, durable carbide construction, and compact reach, this tool helps you produce high-quality threads consistently, reducing downtime and increasing productivity. Its wide machine compatibility means it fits many setups, making it a reliable addition to any shop that handles small-scale threading tasks, from prototyping to production runs.

Part Numbers

Protool Part Number
MIL5L1820UNK20
Brand
Carmex
Category
Tiny Tool Inserts
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 Tiny Tools - Small Threading Full Profile UN 60° Tool (MIR)

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You are viewing MIL5L1820UNK20. Click any other SKU to view its full details.

Product SKUPitch or Pitch RangeMinimum DiameterReachGradeHolderPriceStock Order
MIR3L1032UNBMK 322.710BMKSIM****H3£22.05 5 days
MIR3L1032UNBXC 322.710BXCSIM****H3£26.08 In Stock
MIR3L1532UNBMK 323.215BMKSIM****H3£27.35 In Stock
MIR3L1532UNBXC 323.215BXCSIM****H3£24.93 In Stock
MIR3L1536UNBMK 363.215BMKSIM****H3£27.35 5 days
MIR3L1536UNBXC 363.215BXCSIM****H3£24.93 In Stock
MIR4L1532UNBMK 324.115BMKSIM****H4£27.35 5 days
MIR4L1532UNBXC 324.115BXCSIM****H4£24.93 5 days
MIR4L1536UNBMK 364.115BMKSIM****H4£27.35 5 days
MIR4L1536UNBXC 364.115BXCSIM****H4£24.93 5 days
MIR5L1528UNBMK 284.915BMKSIM****H5£28.00 5 days
MIR5L1528UNBXC 284.915BXCSIM****H5£25.48 In Stock
MIR5L1820UNBMK 20518BMKSIM****H5£28.00 5 days
MIR5L1820UNBXC 20518BXCSIM****H5£25.48 In Stock
MIR6L1818UNBMK 186.218BMKSIM****H6£30.00 5 days
MIR6L1818UNBXC 186.218BXCSIM****H6£27.28 5 days
MIR6L1824UNBMK 246.518BMKSIM****H6£30.00 5 days
MIR6L1824UNBXC 246.518BXCSIM****H6£27.28 In Stock
MIR3L1032UNK20 322.710K20SIM****H3£20.95 5 days
MIR5L1528UNK20 284.915K20SIM****H5£24.20 5 days
MIR5L1820UNK20 20518K20SIM****H5£24.20 5 days
MIR6L1818UNK20 186.218K20SIM****H6£25.90 5 days
MIR3L1536UNK20 363.215K20SIM****H3£23.65 5 days
MIR4L1532UNK20 324.115K20SIM****H4£23.65 5 days
MIR6L1824UNK20 246.518K20SIM****H6£25.90 5 days
MIR3L1532UNK20 323.215K20SIM****H3£23.65 5 days
MIR4L1536UNK20 364.115K20SIM****H4£23.65 5 days
MIR5L1528UNTNX 284.915TNXSIM****H5£25.83 5 days
MIR3L1532UNTNX 323.215TNXSIM****H3£25.30 5 days
MIR5L1524UNBXC 245.115BXCSIM****H5£25.48 5 days
MIL3L1032UNBMK 322.710BMKSIM****H3£22.50 5 days
MIL3L1032UNBXC 322.710BXCSIM****H3£22.05 5 days
MIL3L1032UNK20 322.710K20SIM****H3£20.95 5 days
MIL3L1532UNBMK 323.215BMKSIM****H3£27.35 5 days
MIL3L1532UNBXC 323.215BXCSIM****H3£24.93 5 days
MIL3L1532UNK20 323.215K20SIM****H3£23.65 5 days
MIL3L1532UNTNX 323.215TNXSIM****H3£25.30 5 days
MIL3L1536UNBMK 363.215BMKSIM****H3£27.35 5 days
MIL3L1536UNBXC 363.215BXCSIM****H3£24.93 5 days
MIL3L1536UNK20 363.215K20SIM****H3£23.65 5 days
MIL4L1532UNBMK 324.115BMKSIM****H4£27.35 5 days
MIL4L1532UNBXC 324.115BXCSIM****H4£24.93 5 days
MIL4L1532UNK20 324.115K20SIM****H4£23.65 5 days
MIL4L1536UNBMK 364.115BMKSIM****H4£27.35 5 days
MIL4L1536UNBXC 364.115BXCSIM****H4£24.93 5 days
MIL4L1536UNK20 364.115K20SIM****H4£23.65 5 days
MIL5L1524UNBXC 245.115BXCSIM****H5£21.53 5 days
MIL5L1528UNBMK 284.915BMKSIM****H5£28.00 5 days
MIL5L1528UNBXC 284.915BXCSIM****H5£25.48 5 days
MIL5L1528UNK20 284.915K20SIM****H5£24.20 5 days
MIL5L1528UNTNX 284.915TNXSIM****H5£25.83 5 days
MIL5L1820UNBMK 20518BMKSIM****H5£27.98 5 days
MIL5L1820UNBXC 20518BXCSIM****H5£25.40 5 days
MIL5L1820UNK20 Viewing20518K20SIM****H5£24.18 5 days
MIL6L1818UNBMK 186.218BMKSIM****H6£30.00 5 days
MIL6L1818UNBXC 186.218BXCSIM****H6£27.28 5 days
MIL6L1818UNK20 186.218K20SIM****H6£25.90 5 days
MIL6L1824UNBMK 246.518BMKSIM****H6£30.00 5 days
MIL6L1824UNBXC 246.518BXCSIM****H6£27.28 5 days
MIL6L1824UNK20 246.518K20SIM****H6£25.90 5 days

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