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 5920-01-424-0745
NSN 5925-01-550-4481
NSN 6610-01-445-9580
NSN 5975-00-085-8551
NSN 6145-00-661-0192
NSN 5999-01-534-1424
NSN 6610-00-888-3190
NSN 4140-01-161-1048
NSN 5950-00-897-9388
NSN 6110-00-353-0139
NSN 6220-00-067-7645
NSN 5920-01-353-2487