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 5998-01-266-1297
NSN 5985-01-487-5521
NSN 4140-00-177-0463
NSN 6110-01-365-2718
NSN 5930-01-502-4584
NSN 5945-01-527-2487
NSN 5990-01-227-0660
NSN 5905-00-733-9524
NSN 5945-01-569-1516
NSN 6135-00-008-5345
NSN 5985-01-067-8838
NSN 5915-00-016-4293