C28 Vintage 3/4" Chevy Heater Hose Fitting

Heater Nipple/Fitting for 5/8" hose [91-1902]

Four Seasons 84724 Heater Fitting NORS, Vintage NOS Made in USA

4-Port Billet Aluminum Firewall Heater Hose & A/C Bulkhead Fitting In – Line

Four Seasons 84724 Heater Fitting NORS, Vintage NOS Made in USA

Aluminum 4 Port AC Air Conditioning Heater Hose Firewall Bulkhead Fitting Square

Four Seasons 84717 Press Heater Fitting

UAC HVAC Heater Fitting -- Heater Fitting HF 1919C