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 5925-01-370-0889
NSN 5920-00-952-1374
NSN 7035-01-587-3108
NSN 6135-01-570-4284
NSN 5975-00-203-8416
NSN 5935-01-605-9079
NSN 5990-01-400-3299
NSN 5945-01-566-2971
NSN 6650-01-534-3587
NSN 6685-00-283-0659
NSN 5985-01-629-1548
NSN 6145-01-016-0759