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For hoses and piping, a quick connect fitting, also called a push fitting, is a coupling used to provide a fast, make-or-break connection of gas or liquid transfer lines. Operated by hand, quick connect fittings replace threaded or flanged connections, which require wrenches. When equipped with self-sealing valves, quick connect fittings will ...
Side view of a 1.5 to 2.5 inches (38 to 64 mm) adapter. National Hose thread (NH), also known as National Standard Thread (NST). It is the most common type of fire hose coupling used in the United States. The male and female straight (non-tapered) threads screw together and the connection is sealed with a gasket.
Garden Hose Thread first manufactured 1891 2 5/8, 2 3/4, 3, 3 + 1 ⁄ 2, 4, 4 + 1 ⁄ 2, 5, and 6 inches; all 8 tpi The National Association of Fire Engineers adopts a resolution calling for the use of 8 different diameters of couplings. 1898 Earliest effort by the NFPA to create fire hose coupling standards. [11] c.1901
3 ⁄ 4-14NPSH designates female hose ends that mate a hose to a tapered pipe thread without a spigot. The US standard was defined by NFPA 1963, "Standard for Fire Hose Connections", [ 2 ] then later by ANSI-ASME B1.20.7, [ 3 ] which specifies 1 + 1 ⁄ 16 inches (27 mm) diameter straight (non-tapered) thread with a pitch of 11.5 threads per ...
Flare connection: 1) Screw thread; 2) O-ring; 3) Body; 4) Nut; 5) Seal interface; 6) Support ring (sleeve), and 7) Flared tubing. Flared connectors should not be confused with compression connectors, which are generally not interchangeable. Lacking a compression ring, they use a tapered conical shaped connection instead. A specialized flaring ...
A 37° flare type end fitting for flexible hose The AN thread (also A-N ) is a particular type of fitting used to connect flexible hoses and rigid metal tubing that carry fluid. It is a US military-derived specification that dates back to World War II and stems from a joint standard agreed upon by the Army Air Corps and Navy, hence AN.
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