A mechanical vacuum/or cable operated valve designed to thermostatically regulate the flow of water from the engine to the heater core.
NSN 5935-00-694-2762
NSN 5999-01-008-4070
NSN 6130-01-521-4077
NSN 6135-01-426-8282
NSN 6145-01-111-3626
NSN 5965-00-125-6984
NSN 6220-00-155-8007
NSN 5925-00-420-8561
NSN 5975-01-347-9589
NSN 6240-01-090-2280
NSN 7035-00-470-4977
NSN 7035-01-521-9817