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Description
Technical data for the 1/2 inch left-hand die
| Technical data | ||
|---|---|---|
| Nominal diameter d1 inches/mm | G 1/2 in | 20.96 mm |
| Thread pitch P inches/mm | 14 threads per inch | 1.81 mm |
| Outside diameter d2 | 45 mm | |
| Thickness h1 | 14 mm | |
| Number of chip clearance holes | 6 | |
| Required shaft diameter | 20.81mm | |
| Thread angle G | 55° | |
| Thread standard | BSP DIN ISO 228 | |
Die 1/2 inch left-hand G HSS – tool for left-hand threads in gas systems
Die 1/2 inch left-hand is used for cutting left-hand parallel pipe threads to the G (BSPP) standard with a 55° thread angle. High-speed steel (HSS) ensures long cutting edge life when threading steel, copper, and brass pipes. The inch-size left-hand die meets DIN EN 24231 requirements, ensuring full dimensional compatibility with gas and specialized fittings.
Features of the 1/2 inch left-hand die for gas pipes
- High-hardness HSS material – allows repeated threading of materials with tensile strengths up to 800 MPa without loss of precision
- Left-hand BSPP thread form with a 55° angle – a standard used in industrial and flammable gas systems to prevent incorrect assembly
- Thread major diameter 20.95 mm – dimension corresponding to the BSP standard for a nominal size of 1/2 inch
- DIN EN 24231 standard – ensures compatibility with regulators, valves, and connectors in gas systems
- Optimally shaped flutes – ensure smooth material evacuation and minimal cutting resistance
The 1/2 inch left-hand die is a basic tool for servicing gas systems – used when installing regulators for propane-butane, acetylene, and other industrial gas cylinders. The 1/2 inch left-hand size is also found in older industrial installations and machine components that rotate clockwise.
Choose the 1/2 inch left-hand G HSS die for jobs requiring a left-hand thread. This tool is essential in every workshop servicing gas systems.
Frequently asked questions
Fittings with left-hand threads have a notch or groove on the nut surface – a marking used in gas systems. The 1/2 inch size is nominally 12.7 mm (1.27 cm), while the major diameter of the BSP thread is 20.95 mm.
The 1/2 inch BSP left-hand thread is used on cylinders containing flammable gases – propane-butane, acetylene, hydrogen, and methane. This standard prevents accidental connection of a flammable gas cylinder to an oxygen or other nonflammable gas system.
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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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