6140-00-657-0406 (16463)
NSN 6140-00-657-0406 (NIIN 00-657-0406) is a battery filler cap in Federal Supply Class 6140, Batteries, Rechargeable — an item, basically round in shape, with or without a vent, designed to fit the electrolyte filler hole in a battery. Manufacturer part number 16463 (Marathonnorco Aerospace, Inc., CAGE 74025).
NIIN assigned May 1970; DEMIL A (none required); export Schedule B 8507.90.4000.