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Description
Technical data for the UNF No 4-48 die
| Technical data | ||
|---|---|---|
| Nominal Diameter d1 Inches/mm/Decimal | UNF No 4-48 | |
| Thread Pitch P in Inches and mm | 48 threads per inch | 0.53 mm |
| Thread Diameter mm / Decimal | 2.85 mm / 0.112 in | |
| Outside Diameter d2 | 20 mm | |
| Thickness h1 | 5 mm | |
| Number of Chip Holes | 3 | |
| Required Shaft Diameter | 2.75 mm | |
| Thread angle G | 60° | |
| Thread Standard | ANSI B-1.1 | |
Die UNF No 4-48 HSS – miniature tool for the smallest threads
UNF No 4-48 die is designed to cut very small external threads with a diameter of No 4 (2.84 mm) and 48 threads per inch. This is one of the smallest threads in the UNF (Unified National Fine) system, ideal for applications requiring maximum precision. Tolerance class 2A provides optimum assembly clearance.
Characteristics of the UNF No 4-48 die
- Extremely fine pitch of 48 threads/inch – a 20% finer pitch than UNC No 4-40
- Diameter of only 2.84 mm – for microelectronics, optics, and measuring instruments
- Class 2A – standard tolerance for general-purpose joints
- HSS steel in accordance with DIN 22568 – precision machining of delicate components
- 60° profile – compatibility with the entire Unified thread family
The die is used in watchmaking, medical equipment manufacturing, precision optics, and electronics. The fine UNF No 4-48 thread offers a larger contact area and finer adjustment than its coarse-thread counterpart.
Frequently asked questions
Formula: 0.060" + (4 × 0.013") = 0.112" × 25.4 = 2.84 mm. Size No 4 measures 2.84 mm.
UNF has 48 threads/inch, while UNC has only 40. The fine thread has a 20% higher thread count (8 more threads).
For watchmaking, precision optics, electronics, and medical equipment requiring miniature connections.
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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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