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 5930-00-230-7492
NSN 5960-00-843-8063
NSN 5990-00-162-7273
NSN 5835-01-267-3388
NSN 5835-01-034-5206
NSN 5975-00-460-5045
NSN 5905-00-081-0532
NSN 5996-01-223-4665
NSN 5965-01-658-4674
NSN 4140-01-198-5652
NSN 6105-01-033-6610
NSN 5910-00-990-8517