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Carmex Threading Tap - Spiral Flute - UNC Supercut Tap - Powder Metal - No. 4 x 40
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Description
Carmex Threading Tap with Spiral Flute and UNC Supercut geometry delivers precise Unified National Coarse threading in a durable, powder metal tool. Designed for machinists and fabrication shops, it excels in high-speed tapping and challenging materials while maintaining consistent thread quality.
- No. 4 x 40: Tap size and length suitable for common UNC applications in metalworking.
- Threading standard: Unified National Coarse (UNC) threads for reliable, widely compatible fastener engagement.
- Flute design: Spiral flutes efficiently evacuate chips, reducing clogging and heat buildup during tapping.
- Material: Powder metal construction delivers durability and wear resistance for repeated use in demanding environments.
- Drive/interface: Hex drive end provides secure engagement in tapping heads for smooth operation.
- Performance: Optimized for high-speed threading and tough materials, delivering consistent thread quality and longevity.
The combination of powder metal durability and spiral flute efficiency helps minimize downtime from chip packing and tap breakage. The UNC Supercut profile ensures clean, accurate threads that improve fastener fit and assembly reliability. With a standard No. 4 x 40 size, this Carmex tap is a dependable choice for everyday UNC tapping tasks in metalworking, repair, and fabrication projects.
Part Numbers
- Protool Part Number
- CTSD371C440UNC2BXXT3
- Brand
- Carmex
- Category
- Threading Tap
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.
Full Range: Carmex Threading Taps - Spiral Flute - UNC Supercut Tap - Powder Metal
View full collection →You are viewing CTSD371C440UNC2BXXT3. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Overall Length | Flute Length | Square | Drill Diameter | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|---|
| CTSD371C256UNC2BXXT3 | No. 2 | 56 | 45 | 10 | 2.1 | 1.85 | £37.98 | 5 days | |
| CTSD371C440UNC2BXXT3 Viewing | No. 4 | 40 | 56 | 5 | 2.7 | 2.35 | £29.70 | 5 days | |
| CTSD371C540UNC2BXXT3 | No. 5 | 40 | 56 | 7 | 2.7 | 2.65 | £29.70 | 5 days | |
| CTSD371C632UNC2BXXT3 | No. 6 | 32 | 56 | 6 | 3 | 2.85 | £31.30 | 5 days | |
| CTSD371C832UNC2BXXT3 | No. 8 | 32 | 63 | 7 | 3.4 | 3.5 | £33.98 | 5 days | |
| CTSD371C1024UNC2BXXT3 | No. 10 | 24 | 70 | 8 | 4.9 | 3.9 | £33.98 | 5 days | |
| CTSD371C1224UNC2BXXT3 | No. 12 | 24 | 80 | 10 | 4.9 | 4.5 | £35.20 | 5 days | |
| CTSD371C025020UNC2BXXT3 | 1/4 | 20 | 80 | 13 | 5.5 | 5.1 | £42.28 | 5 days | |
| CTSD371C031218UNC2BXXT3 | 5/16 | 18 | 90 | 13 | 6 | 6.6 | £42.28 | 5 days | |
| CTSD371C037516UNC2BXXT3 | 3/8 | 16 | 100 | 15 | 8 | 8 | £55.54 | 5 days | |
| CTSD376C043714UNC2BXXT3 | 7/16 | 14 | 100 | 15 | 6.2 | 9.4 | £72.22 | 5 days | |
| CTSD376C050013UNC2BXXT3 | 1/2 | 13 | 110 | 18 | 7 | 10.8 | £97.24 | 5 days | |
| CTSD376C056212UNC2BXXT3 | 9/16 | 12 | 110 | 20 | 9 | 12.2 | £97.24 | 5 days | |
| CTSD376C062511UNC2BXXT3 | 5/8 | 11 | 110 | 22 | 9 | 13.5 | £115.46 | 5 days |
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