6630-00-449-6609 (6630004496609)
NSN 6630-00-449-6609 (NIIN 00-449-6609) is an antifreeze solutions tester in Federal Supply Class 6630, Chemical Analysis Instruments — an item consisting of a syringe and hydrometer designed to determine the freezing temperature of antifreeze solutions commonly used in liquid cooled engines. Manufacturer part number 6630004496609 (Thermo Instruments Inc, CAGE 2G784).
NIIN assigned January 1963; DEMIL A (none required); export Schedule B 9027.80.3200; ships at 1 lb / 0.1 cu ft.