Reducing bushing

A reducing bushing is a forged threaded fitting that adapts a larger threaded opening to a smaller threaded connection, commonly using an external male interface and an internal female interface. This distinguishes it from a two-ended threaded coupling, an in-line reducer, and a male-ended nipple. The generic identity does not establish hex or flush body form, thread standard, or detailed geometry. Selection should define the outer and inner thread sizes and forms, reduction, material, sealing method, tool clearance, thread engagement, and any flow-path limitations.