York S1-029-20422-058 Natural Gas Pilot Orifice #58 .042

The York S1-029-20422-058 Natural Gas Pilot Orifice is a metered gas flow insert used to regulate fuel delivery to the pilot burner in ignition assemblies. It is sized as #58 with a 0.042-inch opening, allowing controlled passage of natural gas for steady pilot flame conditions. In HVAC systems it is commonly used in gas-fired furnaces and unit heaters where it is fitted into the pilot tubing or burner pilot assembly to maintain proper ignition behavior. The orifice is positioned within the pilot line section of the combustion system, supporting consistent flame establishment during start-up.