Thread class can also be 3a
An item specifically designed to fit over the opening(s) of various items to provide mechanical protection and/or to prevent the entrance of foreign matter during painting, shipping, storage, or the like. It is not designed to retain fluids under pressure during equipment operation. Excludes cover, electrical connector; hood, sealing, bottle; and stopper, bottle. For items designed to fit into or over the opening(s) of various items, see cap-plug, protective, dust and moisture seal.
Classification: Gaskets,washers & other seals
NSN 6145-01-318-2089
NSN 5920-01-011-9378
NSN 6110-01-152-2840
NSN 6135-01-628-2903
NSN 6150-01-521-8628
NSN 5915-01-555-4239
NSN 5950-01-318-0053
NSN 5985-01-265-8416
NSN 5990-01-024-9659
NSN 5930-01-467-1849
NSN 7035-01-429-7954
NSN 5985-00-489-6815