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Description
Technical data for the UNEF 1/2-28 die
| Technical data | ||
|---|---|---|
| Nominal Diameter d1 Inches/mm/Decimal | UNEF 1/2-28 | |
| Thread Pitch P in Inches and mm | 28 threads per inch | 0.91 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 | 12.6 mm | |
| Thread angle G | 60° | |
| Thread Standard | ANSI B-1.1 | |
Die UNEF 1/2-28 HSS – precision Extra Fine inch threading die
UNEF 1/2-28 die is a tool designed to cut external threads with an extra fine pitch to the American standard. Made of high-speed steel (HSS) in accordance with DIN 22568, it cuts threads with a diameter of 1/2 inch (12.7 mm) and 28 threads per inch on components requiring minimal clearance.
Advantages of the UNEF 1/2-28 HSS die
- Extra fine pitch of 28 TPI – exceptional adjustment precision and maximum resistance to self-loosening
- HSS high-speed steel – suitable for machining structural steels up to 800 MPa and light alloys
- Tolerance 2A in accordance with ANSI B1.1 – guaranteed correct fit with Unified system nuts
- 60° thread profile – full compatibility with the American standard
- Manufactured to DIN 22568 – proven quality and universal fit in die stocks
UNEF 1/2 die is suitable for manufacturing measuring equipment, precision optics, and defense industry applications. The common 12.7 mm diameter with the finest pitch of 28 TPI is a choice for applications requiring maximum connection stability.
Frequently asked questions
The 1/2-inch dimension equals exactly 12.7 mm. The inch-to-millimeter conversion factor is 25.4 mm/inch. Result: 0.5 × 25.4 = 12.7 mm.
UNEF has the finest pitch in the Unified family. UNC represents coarse threads, UNF fine threads, and UNEF extra fine threads. For a diameter of 1/2 inch: UNC is 13 TPI, UNF is 20 TPI, and UNEF is 28 TPI.
The Unified system also includes: UNC – coarse threads, UNF – fine threads, UNS – special nonstandard threads, and UN – constant-pitch threads 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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