It is standard for the Honeywell Q179A and Q179B pilot burners that require a 0

NPT barbed connections

Durable Capillary Leads: Features 36-inch capillaries to minimize vibration transfer to the switch mechanism

this Grade 5 element provides superior protection for downstream equipment

This is a standard part for many 3-ton to 4-ton York AC and heat pump condensers requiring a 45/5 MFD split

Armstrong International A9739 Air Vent Freon It is standard for theThe Armstrong International A9739 Thermostat Air Vent is a critical OEM replacement part designed specifically for "A", "K", "J", and "L" Series float and thermostatic steam traps. Built for high demand environments, this steam trap air vent effectively discharges non condensable gases and CO2, preventing air binding and ensuring efficient heat transfer throughout your steam system. It features a balanced pressure phosphor bronze thermostatic wafer