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Description
Technical data for the UNEF 3/4-20 die
| Technical data | ||
|---|---|---|
| Nominal Diameter d1 Inches/mm/Decimal | UNEF 3/4-20 | |
| Thread Pitch P in Inches and mm | 20 threads per inch | 1.27 mm |
| Thread Diameter mm / Decimal | 19.05 mm / 0.75 in | |
| Outside Diameter d2 | 45 mm | |
| Thickness h1 | 14 mm | |
| Number of Chip Holes | 6 | |
| Required Shaft Diameter | 18.9 mm | |
| Thread angle G | 60° | |
| Thread Standard | ANSI B-1.1 | |
Die UNEF 3/4-20 HSS – extra-fine inch threading die for precision joints
UNEF 3/4-20 die is a professional tool for cutting external threads to the American Extra Fine standard. Made from high-speed steel (HSS) in accordance with DIN 22568, it cuts threads with a diameter of 3/4 inch (19.05 mm) and 20 threads per inch on components requiring high joint stability.
Key advantages of the UNEF 3/4-20 die
- Extra fine pitch, 20 TPI – fine pitch for precise adjustment and maximum resistance to loosening
- HSS high-speed steel – durability when machining structural steels up to 800 MPa and aluminum alloys
- Tolerance 2A in accordance with ANSI B1.1 – standard accuracy class for industrial fits
- 60° thread profile – full compatibility with the Unified thread family
- DIN 22568 standard – guaranteed quality and universal fit for die holders
UNEF 3/4 die is used in the aviation industry, precision hydraulics, and the servicing of equipment imported from the USA. A diameter of 19.05 mm with 20 TPI is a choice for joints exposed to intense vibration and dynamic loads.
Frequently asked questions
A diameter of 3/4 inch equals 19.05 mm. The conversion uses a factor of 25.4 mm per inch. Calculation: 0.75 × 25.4 = 19.05 mm.
UNEF (Extra Fine) has the highest thread count per inch in the Unified system. UNC is a coarse thread, UNF a fine thread, and UNEF an extra-fine thread. For a size of 3/4 inch: UNC has 10 TPI, UNF has 16 TPI, and UNEF offers 20 TPI.
The Unified family also includes: UNC – the coarse-thread version, UNF – the fine-thread variant, UNS – special threads with nonstandard specifications, and UN – constant-pitch series with 4, 6, 8, 12, 16, 20, 28, or 32 threads per inch.
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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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