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Description
Technical data for the UNC No 3-48 die
| Technical data | ||
|---|---|---|
| Nominal Diameter d1 Inches/mm/Decimal | UNC No 3-48 | |
| Thread Pitch P in Inches and mm | 48 threads per inch | 0.53 mm |
| Thread Diameter mm / Decimal | 2.52 mm / 0.099 in | |
| Outside Diameter d2 | 20 mm | |
| Thickness h1 | 7 mm | |
| Number of Chip Holes | 3 | |
| Required Shaft Diameter | 2.4 mm | |
| Thread angle G | 60° | |
| Thread Standard | ANSI B-1.1 | |
Die UNC No 3-48 HSS – the smallest inch thread for microelectronics
UNC No 3-48 die is designed to produce miniature external threads with a No 3 diameter (2.51 mm) and a very fine pitch of 48 threads per inch. This size is used in precision electronics, measuring instruments, and clock mechanisms. HSS ensures accuracy when machining the smallest diameters.
Properties of the UNC No 3-48 American threading die
- Miniature diameter of 2.51 mm – for the smallest screws in precision electronics
- 48 threads per inch – very fine pitch for high accuracy
- HSS material – effective threading of nonferrous metals and steels up to 800 MPa
- Conforms to DIN 22568 – standardized external die dimension
- 60° profile – compliance with the Unified National system
A die designed for laboratories, electronics service shops, and manufacturers of test and measurement equipment. It ensures precision and repeatability when threading microcomponents.
Frequently asked questions
The No 3 thread has a diameter of 2.51 mm (0.099 inch). Conversion factor: 1 inch = 25.4 mm. Example: 0.099 × 25.4 = 2.51 mm.
The Unified family also includes: UNF – fine threads, UNEF – extra-fine threads, UNS – special threads, and UN – constant-pitch threads with 4, 6, 8, 12, 16, 20, 28, or 32 threads per inch.
UNC has a coarser pitch and fewer threads per inch than UNF. Size No 3 has 48 threads per inch in the UNC standard and 56 threads per inch in the UNF standard. Inch thread gauges are used for identification.
Product accessories
UNC No 3-48 DIN 376 HSSE Fra Tapping
Reference: 0000006800 In stock < 10 items
€10.53
€12.95 brutto
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