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 5935-01-220-7318
NSN 5975-00-900-4013
NSN 5960-01-316-8100
NSN 6130-01-549-9231
NSN 2925-00-021-9580
NSN 5996-00-222-6049
NSN 6610-01-042-8621
NSN 6145-00-185-4515
NSN 5950-01-003-0886
NSN 5925-01-087-4854
NSN 6650-01-359-5385
NSN 6620-01-105-5770