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Carmex Threading Tap - Spiral Point - UNC Supercut Tap - HSS-E - No. 4 x 40

Carmex Threading Tap - Spiral Point - UNC Supercut Tap - HSS-E - No. 4 x 40

SKU:CTPD371B440UNC2BXT5

The Carmex Threading Tap is a high-performance UNC spiral-point tap built for precision threading in challenging materials. Designed for machinists and production environments, it delivers reliabl... Read more ↓
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StyleSpiral Point
FormUNC
SizeNo. 4
Pitch40
Tolerance2B
StandardDIN 371
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£19.34
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The Carmex Threading Tap is a high-performance UNC spiral-point tap built for precision threading in challenging materials. Designed for machinists and production environments, it delivers reliable cutting, chip control, and long tool life in demanding applications.

  • Design: Spiral Point geometry channels and ejects chips along the thread, reducing chip clogging and improving surface finish.
  • Material: HSS-E (high-speed steel with cobalt) for enhanced heat resistance and wear resistance during heavy cutting.
  • Thread Standard: Unified National Coarse (UNC) threads for general-purpose compatibility with common imperial fasteners.
  • Size: No. 4 x 40, suitable for standard No. 4 UNC thread applications with a 40 mm overall length.
  • Durability: Reinforced cutting edges and heat resistance support high-speed threading and extended service life.
  • Chip Evacuation: Efficient chip removal minimizes tool loading and reduces the risk of workpiece damage.
  • Applications: Ideal for threading in challenging materials such as harder alloys and metals in production, repair, and maintenance tasks.

Experience cleaner, faster threading with fewer interruptions. The spiral-point design drives chips away from the cut, while the cobalt-infused HSS-E construction stands up to heat and wear in high-speed operations. No. 4 UNC threads are produced with consistent pitch and depth, improving fastener fit and reliability in assemblies. This tap is a dependable choice for workshops aiming to reduce cycle times and extend tool life in metalworking and manufacturing tasks.

Style Spiral Point
Form UNC
Size No. 4
Pitch 40
Tolerance 2B
Standard DIN 371
Reach 18
Thread Direction Right Hand
Substrate HSS-E
Materials Universal
Shank Diameter 3.5
Overall Length 56
Flute Length 10
Square 2.7
Drill Diameter 2.35
Finish XT5

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.

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Staff are very helpful and polite.Goods that were in stock were dispatched same day and back orders were quick in coming through .
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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.
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Full Range: Carmex Threading Taps - Spiral Point - UNC Supercut Tap - HSS-E

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You are viewing CTPD371B440UNC2BXT5. Click any other SKU to view its full details.

Product SKUSizePitchOverall LengthFlute LengthSquareDrill DiameterPriceStock Order
CTPD371B256UNC2BXT5 No. 25645102.11.85£22.22 5 days
CTPD371B440UNC2BXT5 ViewingNo. 44056102.72.35£19.34 In Stock
CTPD371B540UNC2BXT5 No. 54056102.72.65£19.34 5 days
CTPD371B832UNC2BXT5 No. 83263123.43.5£21.34 5 days
CTPD371B1024UNC2BXT5 No. 102470144.93.9£21.34 5 days
CTPD371B1224UNC2BXT5 No. 122480184.94.5£22.12 5 days
CTPD371B025020UNC2BXT5 1/42080185.55.1£26.50 5 days
CTPD371B031218UNC2BXT5 5/1618902066.6£26.50 5 days
CTPD371B037516UNC2BXT5 3/8161002088£34.80 5 days
CTPD376B043714UNC2BXT5 7/1614100226.29.4£45.28 5 days
CTPD376B050013UNC2BXT5 1/21311024710.8£60.94 5 days
CTPD376B056212UNC2BXT5 9/161211025912.2£60.94 5 days
CTPD376B062511UNC2BXT5 5/81111032913.5£69.06 5 days
CTPD376B075010UNC2BXT5 3/410125321116.5£102.64 5 days
CTPD376B08759UNC2BXT5 7/891403214.519.5£138.30 5 days
CTPD376B1-8UNC2BXT5 18160381622.25£189.28 5 days

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