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 5905-01-250-1308
NSN 5855-01-242-8428
NSN 5996-01-651-2285
NSN 5930-00-925-1891
NSN 5925-01-391-8077
NSN 5960-00-322-5394
NSN 5950-00-246-5621
NSN 5930-01-409-2952
NSN 5975-01-479-6550
NSN 5965-01-287-7235
NSN 6645-01-357-9096
NSN 6135-00-951-3426