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Carmex Thread Mills Solid Carbide - Fast Type - For Hard Materials - UN (UNC UNF UNEF UNS) - No. 4 x 40 - MT3
| Thread Form | UN (UNC UNF UNEF UNS) |
| Size | No. 4 |
| Pitch | 40 |
| Diameter (D) | 2.1 |
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Description
The Carmex FSH Thread Mills are high-performance solid carbide tools designed for fast, precise thread milling in hard materials. Sized No. 4 x 40 with MT3 shank, they’re built for engineers and machinists who demand reliable UNC/UNF/UNEF/UNS thread forms in hardened alloys up to 65 HRC.
- Thread size and standard: No. 4 x 40 thread, compatible with UNC, UNF, UNEF, and UNS thread forms for versatile threading in a single toolpath.
- Shank size: MT3 shank designed for rigid mounting on standard CNC tool holders.
- Material: Solid carbide construction delivers exceptional hardness resistance and long tool life in demanding materials.
- Flute count: Up to 7 flutes, boosting rigidity and efficient chip evacuation for hard materials.
- Coating: Ultra-fine MT3 grade with a PVD multi-layer coating providing high heat and wear resistance for machining superalloys and hard materials up to 65 HRC.
- Performance: Enhanced cutting edge stability and reduced tool deflection at high speeds for precise thread forms.
The FSH line represents an advancement over traditional thread milling tools, combining a higher flute count with a rugged coating to deliver reliable threads in materials that challenge standard tooling. With MT3 compatibility and No. 4 x 40 sizing, these mills fit a broad range of fasteners and joint configurations, helping you achieve clean, accurate threads with minimal burrs and consistent pitch. Ideal for aerospace, automotive, and industrial manufacturing where hardened materials and precise threading matter most.
Part Numbers
- Protool Part Number
- FSH06021D940UNMT3
- Brand
- Carmex
- Category
- Thread Mill
Need cutting data? Call 01732 887334 or email sales@protool-ltd.co.uk.
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 Carbide Thread Mills - UN - Mini Type For Hard Materials Up To 65HRC (FSH)
View full collection →You are viewing FSH06021D940UNMT3. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Flute Length | Reach | Shank Diameter | Overall Length | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|---|
| FSH06021D640UNMT3 | No. 4 | 40 | 1.91 | 6.3 | 58 | £88.10 | 5 days | ||
| FSH06021D940UNMT3 Viewing | No. 4 | 40 | 1.91 | 9.2 | 6 | 58 | £114.68 | 5 days | |
| FSH06024D1040UNMT3 | No. 5 No. 6 | 40 | 1.91 | 10.2 | 58 | £88.10 | 5 days | ||
| FSH06024D740UNMT3 | Mo. 5 No. 6 | 40 | 1.91 | 7 | 58 | £88.10 | 5 days | ||
| FSH06025D1132UNMT3 | No. 6 | 32 | 2.38 | 11.3 | 58 | £88.10 | 5 days | ||
| FSH06025D732UNMT3 | No. 6 | 32 | 2.38 | 7.8 | 58 | £88.10 | 5 days | ||
| FSH06032D1332UNMT3 | No. 8 | 32 | 2.38 | 13.3 | 58 | £88.10 | 5 days | ||
| FSH06032D932UNMT3 | No. 8 | 32 | 2.38 | 9.1 | 58 | £88.10 | 5 days | ||
| FSH06038E1032UNMT3 | No. 10 | 32 | 2.38 | 10.5 | 58 | £88.10 | 5 days | ||
| FSH06038E1532UNMT3 | No. 10 | 32 | 2.38 | 15.3 | 58 | £88.10 | 5 days | ||
| FSH06048E1420UNMT3 | 1/4 | 20 | 3.81 | 14 | 58 | £88.10 | 5 days | ||
| FSH06048E2020UNMT3 | 1/4 | 20 | 3.81 | 20.3 | 58 | £88.10 | 5 days | ||
| FSH06052F1328UNMT3 | 1/4 | 28 | 2.72 | 13.6 | 58 | £88.10 | 5 days | ||
| FSH06052F2028UNMT3 | 1/4 | 28 | 2.72 | 20 | 58 | £114.70 | 5 days | ||
| FSH08066F1624UNMT3 | 5/16 3/8 | 24 | 3.18 | 16.9 | 64 | £117.48 | 5 days | ||
| FSH08066F2424UNMT3 | 5/16 3/8 | 24 | 3.18 | 24.9 | 64 | £117.48 | 5 days |
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