A fitting is any machine component, pipe, or piece of plumbing that can connect or connect two or more larger pieces. Examples are couplings, compression fittings, and pipe and plumbing fittings. A plug is an item that 1 provides a tight closure for an opening designed to ensure a watertight seal such as for a sink or bottle, or for a hole or space 2 completes an electrical connection. The plug may be removable as for portable equipment, require a tool for assembly and removal, or serve as a permanent electrical joint between two points. Specifications: Size: 0.25 x 0.375 in. Height: 0.45 in. Width: 1.1 in. Length: 0.55 in.