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 5920-01-620-6564
NSN 5975-01-449-1203
NSN 6685-00-671-9329
NSN 6620-00-247-4474
NSN 5975-00-965-6909
NSN 5905-01-560-3592
NSN 6650-00-839-2527
NSN 6135-00-276-7625
NSN 5895-01-546-2193
NSN 5998-00-973-8659
NSN 6645-01-072-2486
NSN 5975-00-104-5399