Milton (527) 12" Bayonet Inflator Gauge Hose Whip Replacement &ndash; Dual truck Tire Chuck Head Replacement hose whip for Milton bayonet inflator gauge #522/S-522. Replacement air chuck: Milton #500-4. All Milton replacement hose whips have 1/4 NPT threads and are interchangeable with any Milton bayonet gauge. Pressure range of PSI (10-120) and kPa (80-840). Air chuck threads: 1/8-27 NPT.