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 5910-01-514-0772
NSN 5895-00-936-6987
NSN 5985-01-096-1083
NSN 5915-01-023-8387
NSN 5996-00-518-0460
NSN 6135-00-321-6707
NSN 5960-00-407-7705
NSN 5945-01-060-1931
NSN 5998-01-019-4625
NSN 5998-01-349-3458
NSN 5990-01-378-7349
NSN 5996-01-302-8776