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Description
Technical data for the UN 5/16-48 die
| Technical data | ||
|---|---|---|
| Nominal Diameter d1 Inches/mm/Decimal | UN 5/16-48 | |
| Thread Pitch P in Inches and mm | 48 threads per inch | 0.53 mm |
| Thread Diameter mm / Decimal | 7.94 mm / 0.3125 in | |
| Outside Diameter d2 | 25.4 mm | |
| Thickness h1 | 9.5 mm | |
| Number of Chip Holes | 4 | |
| Required Shaft Diameter | 7.87 mm | |
| Thread angle G | 60° | |
| Thread Standard | ANSI B-1.1 | |
UN 5/16-48 HSS die – inch die for extra fine threads
UN 5/16-48 die is a specialized tool for cutting external threads with an extra fine pitch to the American standard. Made of high-speed steel (HSS) in accordance with DIN 22568, it enables precise threading with a diameter of 5/16 inch (7.94 mm) and a pitch of 48 threads per inch – one of the finest in the UN system.
Key features of the UN 5/16-48 die
- Extra fine pitch of 48 TPI – provides exceptional adjustment precision and maximum resistance to loosening under vibration
- HSS high-speed steel – allows machining of materials with a strength of up to 800 MPa, including steel and aluminum alloys
- Tolerance 2A according to ANSI B1.1 – standard manufacturing accuracy ensuring proper fit
- 60° thread profile – compliance with the American Unified system
- DIN 22568 – proven quality and compatibility with industrial die stocks
UN 5/16-48 die is used in precision engineering, aviation, and measuring equipment manufacturing. Such a fine thread is selected for joints requiring minimum clearance and maximum stability. An ideal tool for specialized technical applications.
Frequently asked questions
A diameter of 5/16 inch is 7.94 mm. The inch-to-millimeter conversion factor is 25.4 mm/inch. The result is obtained by multiplying 0.3125 by 25.4.
UN threads have a constant pitch regardless of diameter, unlike UNC and UNF, where the thread count depends on size. UN 48 always means 48 threads per inch, regardless of diameter.
The UN standard specifies constant pitches of 4, 6, 8, 12, 16, 20, 28, and 32 threads per inch. Selection depends on the strength and precision requirements of the application.
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| 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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