A circular shaped item with an aperture manufactured to predetermined dimensions and designed for use as a seal in stuffing boxes, packing nuts, and the like. It may be (1) any nonmetallic molded or formed ring (except solid (without joint) rings having a square or rectangular cross section); or (2) any shredded metal or metal foil type metallic or semimetallic rings. Excludes felt items but includes multimaterial items in which one of the materials is felt. For solid (without joints) nonmetallic items with a square or rectangular cross section, see washer (as modified) and gasket. For rubber items specifically designed for weather-proofing doors, windows, chests, and the like see seal, nonmetallic angle; seal, nonmetallic channel; and seal, nonmetallic, special shaped section. For circular (with aperature) nonmetallic items with a solid round cross-section see o-ring. Excludes cup, compression; gasket; washer (as modified); and felt, mechanical, preformed.
Classification: Gaskets,washers & other seals
NSN 4140-01-652-0207
NSN 6130-01-111-8731
NSN 5990-00-568-4940
NSN 5999-01-311-5841
NSN 6610-00-243-7025
NSN 6320-01-377-5701
NSN 5998-01-654-3975
NSN 6145-00-669-6795
NSN 6620-00-719-4915
NSN 5905-01-243-9170
NSN 5998-01-561-3113
NSN 6645-00-679-8203