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National Screw Thread Commission updates its small hose screw couplings. Covers "National Fire-Hose Coupling Thread Form" (NFHCT) recommended by NFPA "previously known as National Standard Hose Coupling Thread" and garden hoses (3/4 in.--11 1/2 threads per inch). Small hose couplings (0.5 to 2") use "National Form of Thread".
Examples of adapters include one end BSP threaded with the other NPT threaded, and one end threaded with the other a plain socket for brazing. A coupling whose ends use the same connection method but are of different sizes is called a reducing coupling or reducer. An example is a 3/4" NPT to 1/2" NPT coupling.
JIC fittings, defined by the SAE J514 and MIL-DTL-18866 standards, are a type of flare fitting machined with a 37-degree flare seating surface. JIC (Joint Industry Council) fittings are widely used in fuel delivery and fluid power applications, especially where high pressure (up to 10,000 pounds per square inch (690 bar)) is involved.
All Pressends Pressend / Male Thread Pressend / Female Thread Valve Connection Flange End-Connector Elbow 90°, F/F & F/M Elbow 45°, F/F & F/M Bend 15°, 45°, 75° M/M Coupling Coupling Long Tee Elbow 90° Male Coupling Bend 90° Male Thread Tee Male Union Male Coupling Male Straight Connector Elbow 90° Female Coupling
This coupling is used by Spanish firefighters, and is defined by Spanish Standard UNE 23400. [15] It is a sexless coupling with three engaging lugs, and is available in several different sizes, including Barcelona 25 (25 mm hose ID), Barcelona 45 (45 mm hose ID), and Barcelona 70 (70 mm hose ID). Suitable for delivery (pressure) only, not suction.
The taper rate for all NPT threads is 1 inch of diameter in 16 inches of length (3 ⁄ 4 inch per foot or 62.5 millimeters per meter) measured by the change of diameter (of the pipe thread) over distance of thread.
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