My first thought for this topic was the type of threads on a water hose. Here is more than you ever wanted to know about garden hose threads:
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The thread standard for garden hose connectors is known as "garden hose thread" (GHT), but its official designation is NH (NH stands for "National Hose" 3/4-11.5NH is for full form threads as produced by cutting material such as the brass spigot outlet or hose male or female end fitting found on more expensive hoses 3/4-11.5NHR is for thin-walled couplers produced by rolling thin material, usually brass, typically found on less expensive hoses 3/4-14NPSH is for female hose ends that mate a hose to a tapered pipe thread without a spigot). The standard was defined by NFPA 1963, "Standard for Fire Hose Connections", then later by ANSI-ASME B1.20.7, which is 1 1/16 inches (27 mm) diameter straight (non-tapered) thread with a pitch of 11.5 threads per inch (TPI). The female thread is abbreviated FHT (for "female hose thread"), and the male part is abbreviated MHT (for "male hose thread"). This fitting is used with 1/2-inch, 5/8-inch, and 3/4-inch hoses.