The United States, its territories and Canada:

• The standard thread used for garden hoses is commonly known as garden hose thread (GHT), but officially its title is NH ("National Hose") defined in ANSI B1.20.7. There are two designations. NHR is for thin-walled couplers on hoses formed from rolled, thin material and NH is for full-form threads cut into thicker material, typically used for bib cocks and female hose ends. Male threads for garden hoses are also abbreviated as MHT for "male hose thread" and female threads as FHT for "female hose thread".
• Threads are non-tapered, i.e parallel. Unlike tapered threads which wedge together when tightened, parallel threads don't seal without PTFE tape so usually rubber washers or o-rings are used in fittings to stop them leaking.
• Fittings have an external thread diameter of 1 ¹/₁₆", with a thread pitch of 11.5 threads per inch (TPI). A 3/4 inch GHT fitting is suitable for hoses with an internal diameter of 1/2", 5/8" or 3/4".
• GHT is not compatible with National Pipe Tapered (NPT) as used for plumbing fittings. NPT threads however are used on the section of a bibcock that connects to the plumbing that feeds it.
• Some hoses may be fitted with an NPSH (National Pipe Straight Hose) female, parallel threaded connector for connecting to a tapered threaded fitting on a water supply pipe (i.e. not a spigot). The 3/4" connector has 14 threads per inch and is not compatible with spigots. An adapter however can be used.