A/C Fitting Torque Guide The following is a general list of recommended torque values for standard O-ring fittings for reference during service operations. Always use specific torque values on installation instructions over these general values. HOSE FITTING CONNECTIONS -- RECOMMENDED TORQUE VALUE: Fitting Size* Thread Size Torque Value (ft/lbs) # 6 5/8-18 11 to 13 # 8 3/4 - 16 or 18 15 to 18 #10 7/8 - 14 or 18 18 to 22 #12 11/16 - 14 or 16 24 to 28 *Do not judge fitting size by the size of the hose. Many times they will not be the same. COMPRESSOR FITTINGS AND SERVICE VALVES Type Thread Size Torque Value (ft/lbs) 3-Way Service Valve to Compressor Fitting 1-14 20-40 Compressor: Sanden, Seltec, Zexel 3/4-16 18-22    7/8-14 18-22 HOSE TO METAL COMPRESSION FITTING See specific instructions for this type fitting. Go Back to Technical Support