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Description
Technical data for the UN 7/8-16 die
| Technical data | ||
|---|---|---|
| Nominal Diameter d1 Inches/mm/Decimal | UN 7/8-16 | |
| Thread Pitch P in Inches and mm | 16 threads per inch | 1.59 mm |
| Thread Diameter mm / Decimal | 22.23 mm / 0.875 in | |
| Outside Diameter d2 | 90 mm | |
| Thickness h1 | 22 mm | |
| Number of Chip Holes | 8 | |
| Required Shaft Diameter | 22.06 mm | |
| Thread angle G | 60° | |
| Thread Standard | ANSI B-1.1 | |
Die UN 7/8-16 HSS – an inch die with a constant pitch of 16 TPI
UN 7/8-16 die is a professional tool for cutting external threads in the American constant-pitch system. Made of high-speed steel (HSS) in accordance with DIN 22568, it enables precision threading with a diameter of 7/8 inch (22.23 mm) and a pitch of 16 threads per inch on rods, shafts, and structural components.
Main advantages of the UN 7/8-16 die
- Constant pitch of 16 TPI – a versatile value combining precision with adequate threaded joint strength
- HSS high-speed steel – capable of machining structural steels up to 800 MPa as well as aluminum and brass
- Tolerance 2A in accordance with ANSI B1.1 – standard accuracy class for American fits
- Thread angle 60° – full compatibility with the Unified thread system
- DIN 22568 – guaranteed quality and fit in industrial die stocks
Die UN 7/8 performs well in maintenance departments and workshops servicing American-made machinery. A diameter of 22.23 mm with 16 TPI is a common combination used in the machinery and hydraulics industries. A tool for professionals who require reliability.
Frequently asked questions
The 7/8 inch dimension corresponds to 22.23 mm. The conversion factor is 25.4 mm per inch. Calculation: 0.875 × 25.4 = 22.23 mm.
UN threads use a constant number of threads per inch regardless of diameter, whereas UNC and UNF pitches vary with each size. UN 16 always means 16 threads per inch regardless of the nominal size.
The UN standard includes constant pitches of 4, 6, 8, 12, 16, 20, 28, and 32 threads per inch. Pitch selection depends on the strength and precision requirements of the joint.
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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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