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Description
Technical data for the UNF 1 3/8-12 die
| Technical data | ||
|---|---|---|
| Nominal Diameter d1 Inches/mm/Decimal | UNF 1 3/8-12 | |
| Thread Pitch P in Inches and mm | 12 threads per inch | 2.12 mm |
| Thread Diameter mm / Decimal | 34.93 mm / 1.375 in | |
| Outside Diameter d2 | 65 mm | |
| Thickness h1 | 18 mm | |
| Number of Chip Holes | 7 | |
| Required Shaft Diameter | 34.73 mm | |
| Thread angle G | 60° | |
| Thread Standard | ANSI B-1.1 | |
Die UNF 1 3/8-12 HSS – an industrial tool for large-diameter fine threads
Die UNF 1 3/8-12 is used to produce external threads with a diameter of 1 3/8 inch (34.93 mm) and 12 threads per inch. The UNF (Unified National Fine) system provides twice as many threads per inch as its UNC 1 3/8-6 counterpart, resulting in significantly higher load capacity and better resistance to loosening. HSS ensures durability in demanding industrial applications.
Key features of the UNF 1 3/8-12 die
- Pitch of 12 threads/inch – 2× as many threads per inch as UNC 1 3/8-6
- Diameter of 34.93 mm – for the heavy machinery and energy industries
- HSS high-speed steel – machining structural and alloy steels with tensile strengths up to 800 MPa
- Conforms to DIN 22568 – quality verified by a European standard
- Thread angle 60° – compliance with the Unified National system ANSI B1.1
The tool is used in the energy industry, heavy machinery construction, and servicing large equipment. The UNF 1 3/8-12 fine thread minimizes the risk of loosening under extreme loads.
Frequently asked questions
A diameter of 1 3/8 inch equals 34.93 mm. Calculation: 1.375 × 25.4 mm = 34.925 mm ≈ 34.93 mm.
UNF has 12 threads per inch, while UNC has only 6. The difference is 6 threads per inch, meaning UNF has 2× the thread density.
In the heavy machinery and energy industries, and in structures requiring maximum connection load capacity.
Product accessories
Thread ring gauge UNF 1.3/8-12 2A GO NO-GO
Reference: 15423 In stock < 10 items
€89.47
€110.05 brutto
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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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