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 6135-00-299-6918
NSN 6135-01-317-6021
NSN 6650-00-975-6498
NSN 4140-01-467-1986
NSN 6620-01-439-8035
NSN 5950-01-193-8678
NSN 5930-01-011-1502
NSN 5990-00-811-5227
NSN 5920-00-954-3861
NSN 6320-01-570-8814
NSN 5930-01-145-4646
NSN 5935-00-597-2862