McMaster 44705K922 Low Pressure 6061 Aluminum Pipe Adapter, 1 1 4 NPT Female x Butt Weld, Class 150 (sub for 44705K322 — NOT MIL DTL 52618 certified) 722301511725 Temperature Resistant Header Danger Opening Temperature Resistant Header Danger Opening Type Key Language English Door Type Swing Material Steel Function Locks Hinged Door with a Cylinder Keyed Different Lock on the Front and a Recessed Turn Knob on the Inside Wire Room Components Wire Partition Hardware and Accessories Includes Cylinder To prevent cracking Threaded Fitting Connection — Threaded female x butt weld straight adapters are also known as half couplings