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 5990-00-853-1123
NSN 5945-01-306-1952
NSN 5925-01-425-0959
NSN 7035-01-467-7779
NSN 6105-01-579-2813
NSN 5965-01-591-4486
NSN 6650-01-315-6179
NSN 5998-01-147-0040
NSN 6145-01-191-8318
NSN 5925-00-222-6199
NSN 6645-01-390-6520
NSN 5975-00-056-5577