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 5925-01-363-9925
NSN 6135-00-010-5275
NSN 5925-00-997-1298
NSN 6130-01-317-1497
NSN 5925-01-579-1753
NSN 5996-00-349-4192
NSN 4140-01-093-9728
NSN 5905-01-254-4349
NSN 5935-01-035-4326
NSN 6620-00-571-5645
NSN 5920-01-444-4082
NSN 6110-00-660-8998