This item is a flight safety critical aircraft part (fscap).
A part basically circular in shape, designed to cover or seal the filler-neck or inlet opening of a fuel tank, radiator, oil reservoir, liquid storage tank or the like. It may be either permanently attached to the object for which it is designed or provided with a means of removal and replacement. Excludes cap, vent, fuel storage tank; and cover (1), (as modified).
Classification: Other parts of airplanes or helicopters for use in military aircraft (excludes propellers, rotors, undercarriages, and parts thereof)
NSN 6645-01-487-8227
NSN 5905-00-090-9506
NSN 4140-00-320-8614
NSN 5855-01-256-9597
NSN 6220-00-296-4101
NSN 6240-00-204-0459
NSN 5910-00-106-1398
NSN 5920-01-656-3697
NSN 5935-01-454-9985
NSN 4140-01-120-3002
NSN 5998-00-005-5740
NSN 6220-01-391-6084