GW 33-QC-HTPRSP Hose-To-Torch Quick Connector SetBuilt-in automatic reset check valve prevents reverse flow of gases by cutting off the gases under back pressure. Before disconnection, gas must be shut off at regulators. Color codes provide speed and safety. QC-RHF-A has A-Connection. Applications: Hose, Torch; Connection Type: Male/Female; Gas Type: Fuel Gases, Oxygen; Includes: QC-HTF, QC-HTX, Check Valve; Pressure: 29.00 psi [Max], 145.00 psi [Max]; Thread - TPI or Pitch: 9/16 in - 18; Type: Hose-to-Torch Connector Set; Weight: 0.47 lb.