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 5910-01-061-1443
NSN 5990-00-773-9923
NSN 5990-00-991-8723
NSN 2925-01-157-9204
NSN 5925-00-681-1044
NSN 5945-01-391-4999
NSN 6145-01-024-1043
NSN 6110-01-310-9526
NSN 5999-00-644-5596
NSN 2925-01-314-9682
NSN 4140-00-138-4139
NSN 5990-01-423-8189