A mechanical vacuum/or cable operated valve designed to thermostatically regulate the flow of water from the engine to the heater core.
NSN 5895-01-176-6983
NSN 6685-00-795-1316
NSN 6130-01-634-0603
NSN 6220-01-578-5507
NSN 6150-00-299-6678
NSN 5925-00-654-1687
NSN 6110-01-493-4402
NSN 7035-01-594-9198
NSN 5855-01-586-4957
NSN 6610-01-245-8015
NSN 5855-00-472-2055
NSN 5985-01-076-4710