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 5835-01-108-4980
NSN 5990-00-492-5063
NSN 2925-01-513-9114
NSN 5935-00-221-3720
NSN 5985-01-605-3461
NSN 6150-01-487-3830
NSN 6145-00-853-3799
NSN 2925-01-374-2402
NSN 6135-00-334-4500
NSN 6130-01-418-0136
NSN 6320-00-681-1324
NSN 5975-01-429-9503