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Description
Technical data for the UNF 1/2-20 die
| Technical data | ||
|---|---|---|
| Nominal Diameter d1 Inches/mm/Decimal | UNF 1/2-20 | |
| Thread Pitch P in Inches and mm | 20 threads per inch | 1.27 mm |
| Thread Diameter mm / Decimal | 12.7 mm / 0.5 in | |
| Outside Diameter d2 | 38 mm | |
| Thickness h1 | 10 mm | |
| Number of Chip Holes | 5 | |
| Required Shaft Diameter | 12.56 mm | |
| Thread angle G | 60° | |
| Thread Standard | ANSI B-1.1 | |
Die UNF 1/2-20 HSS – a popular tool for precision inch threads
UNF 1/2-20 die enables cutting of external threads with a diameter of 1/2 inch (12.7 mm) and 20 threads per inch. The UNF (Unified National Fine) system provides 54% more threads than its UNC 1/2-13 counterpart, resulting in higher load capacity and better resistance to loosening. The HSS material ensures tool durability.
Key benefits of the UNF 1/2-20 die
- Pitch of 20 threads/inch – a 54% finer pitch than UNC 1/2-13
- Diameter of 12.7 mm – one of the most popular inch sizes
- HSS high-speed steel – for materials with a strength of up to 800 MPa
- DIN 22568 – guaranteed dimensional accuracy and quality
- Thread angle 60° – compliance with the Unified National system ANSI B1.1
The tool is used in hydraulics, pneumatics, automotive applications, and servicing American machinery. The UNF 1/2-20 fine thread provides better connection sealing and stability.
Frequently asked questions
A diameter of 1/2 inch equals 12.7 mm. Calculation: 0.5 × 25.4 mm = 12.7 mm.
UNF has 20 threads/inch, while UNC has only 13. The fine thread has a 54% higher thread count (7 more threads).
In hydraulics, pneumatics, precision fittings, automotive applications, and servicing machinery requiring leak-tightness.
Product accessories
Hand tap UNF 1/2-20 DIN 2181/2 HSS 2B Fra
Reference: 0000007807 In stock > 10 items
€13.16
€16.18 brutto
Thread ring gauge UNF 1/2-20 2A GO NO-GO
Reference: 15415 In stock < 10 items
€50.00
€61.50 brutto
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Shipping
All orders are delivered by courier company GLS. For orders exceeding 369 PLN gross shipping is FREE
| Courier GLS | Przelew24 / Prepayment | 14,76 zł gross | Delivery time 1 working day |
| Courier GLS | Cash on delivery | 17,26 zł gross | Lead time 1 working day |
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