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 5965-01-485-0940
NSN 6610-01-098-7557
NSN 6610-01-461-8180
NSN 5950-00-429-7192
NSN 6685-00-501-6501
NSN 6110-01-154-1040
NSN 5998-01-345-2702
NSN 5990-01-332-3623
NSN 5925-00-182-7452
NSN 5975-01-488-1072
NSN 5999-00-543-0977
NSN 5960-01-142-1995