90° Elbow / Cross / Tee / 45° Elbow – Socket 90° Elbow / Cross / Tee / 45° Elbow – Threaded Coupling / Half Coupling / Cap – Socket Coupling / Half Coupling / Cap – Threaded Hex – Nipple Reducing Coupling – Socket-Weld End Reducing Coupling – Threaded End Square Head Plug / Hex Head Plug / Round Head Plug / Hex Head Bushing / Flush Bushing Street Elbow Union – Socket Union – Threaded