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 5925-01-512-9060
NSN 5975-01-341-1223
NSN 5985-01-511-4297
NSN 5910-00-959-5209
NSN 2925-01-592-3907
NSN 6620-00-562-6337
NSN 5990-00-576-4882
NSN 6135-01-121-3225
NSN 6610-01-103-3932
NSN 5975-01-541-5209
NSN 6320-01-198-4024
NSN 6320-00-270-8222