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 5910-00-947-8320
NSN 6130-01-487-4556
NSN 5915-01-246-9642
NSN 5950-01-127-9443
NSN 5975-01-300-0761
NSN 6240-01-176-4359
NSN 5835-01-378-6804
NSN 5920-01-437-7513
NSN 5950-01-145-7945
NSN 6650-00-419-4183
NSN 5960-01-255-5580
NSN 6105-00-072-8785