Different manufacturers can have the exact same part number. Make sure to check your part links to one of our models! Please contact us if you need help.
Humidaire: FH300 FH300A FH300B MA115 FH300C MA315 MA230 MA230-UNDERDUCT MA230-PLENUM MA-115A
This part may fit other models. Please contact us if you require additional assistance.
Lock nut for humidiare
H-301, 301, H301