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 6240-01-101-1323
NSN 6145-01-569-9162
NSN 5999-01-354-6151
NSN 6220-01-413-4164
NSN 5925-01-075-2728
NSN 6320-01-449-1014
NSN 6620-01-537-4121
NSN 5990-01-512-9129
NSN 2925-01-030-6580
NSN 5965-01-352-4906
NSN 5996-01-222-0790
NSN 5855-01-222-1242