Do I need thread sealant for the flare connections

this 13-inch 904907 mount kit provides the rigid structural support necessary to eliminate excessive vibration and ensure precise motor shaft alignment within the blower housing

This Permanent Split Capacitor (PSC) motor features dual-voltage capability

By sealing off the vent during off-cycles

York S1-329-24441-000 Burner Kit 321042-401 Do I need thread sealantThe York S1 329 24441 000 Burner Kit is a high grade OEM replacement part designed for peak combustion efficiency in York HVAC systems. Engineered from heavy duty stainless steel, this SS burner kit provides superior resistance to thermal fatigue and corrosive combustion byproducts, preventing the common pitting and scaling found in standard aluminized steel burners. This kit is a direct fit for all 80% and 90% tubular models, including the RGF19 gas