Threaded coupling

A threaded coupling is a straight forged fitting with two threaded ends used to join aligned components. Unlike the broader Full coupling title, this identity explicitly establishes threaded connection, but it does not prove equal end sizes, female or male arrangement, or thread form. A coupling is a one-piece connector and does not separate like a union without rotating an adjoining component; it is also distinct from a male-to-female reducing bushing. Selection should define both thread arrangements and sizes, any reduction, material, engagement, sealing method, assembly clearance, and maintenance needs.