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 5998-00-089-8801
NSN 5925-01-168-7370
NSN 6110-00-126-1989
NSN 6240-01-631-7690
NSN 5905-01-291-7663
NSN 6645-01-025-1002
NSN 5998-01-214-1310
NSN 4140-01-215-0298
NSN 5915-00-199-9554
NSN 5975-01-499-7715
NSN 4140-00-625-4289
NSN 5855-01-027-1571