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Description
Technical data for the UNS 1/4-27 die
| Technical data | ||
|---|---|---|
| Nominal Diameter d1 Inches/mm/Decimal | UNS 1/4-27 | |
| Thread Pitch P in Inches and mm | 27 threads per inch | 0.94 mm |
| Thread Diameter mm / Decimal | 6.35 mm / 0.25 in | |
| Outside Diameter d2 | 20 mm | |
| Thickness h1 | 7 mm | |
| Number of Chip Holes | 4 | |
| Required Shaft Diameter | 6.25 mm | |
| Thread angle G | 60° | |
| Thread Standard | ANSI B-1.1 | |
Die UNS 1/4-27 HSS – special inch die with a nonstandard pitch
Die UNS 1/4-27 is a professional tool for producing external threads with a special pitch in the American Unified National Special system. Manufactured from high-speed steel (HSS) in accordance with DIN 22568, it cuts threads with a diameter of 1/4 inch (6.35 mm) and a pitch of 27 threads per inch.
Main features of the UNS 1/4-27 die
- Special pitch of 27 TPI – nonstandard thread density used in specific industrial applications
- UNS special thread – a solution for fasteners outside standard inch thread series
- HSS construction – capable of machining steels with strength up to 800 MPa, as well as aluminum and brass
- Tolerance class 2A according to ANSI B1.1 – guaranteed accuracy for industrial fits
- DIN 22568 standard – dimensional reliability and compatibility with die holders
Die UNS 1/4 is used for servicing equipment imported from the USA and manufacturing specialized fasteners. The pitch of 27 TPI falls between the standard UNC (20 TPI) and UNF (28 TPI) values, offering an intermediate thread option.
Frequently asked questions
A dimension of 1/4 inch equals 6.35 mm. The conversion factor is 25.4 mm per inch. Calculation: 0.25 × 25.4 = 6.35 mm.
UNS (Unified National Special) is a thread with an unusual combination of diameter and pitch. For a size of 1/4 inch, the standard values are: UNC 20 TPI, UNF 28 TPI, UNEF 32 TPI. A pitch of 27 TPI does not fall within any standard series, hence the UNS designation.
The Unified family also includes: UNC – the coarse-thread version, UNF – the fine-thread version, UNEF – the extra-fine-thread version, and UN – constant-pitch series: 4, 6, 8, 12, 16, 20, 28, or 32 threads per inch.
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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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