A mechanical vacuum/or cable operated valve designed to thermostatically regulate the flow of water from the engine to the heater core.
NSN 7035-01-151-0265
NSN 7035-01-503-5517
NSN 5925-00-592-8571
NSN 6610-01-621-4621
NSN 5925-00-033-5682
NSN 5855-00-941-3037
NSN 6320-01-177-3192
NSN 5855-00-928-1912
NSN 6135-00-405-1989
NSN 5930-01-271-5388
NSN 6610-01-589-5146
NSN 5895-00-847-4751