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 5990-01-548-5979
NSN 5975-01-085-5824
NSN 5990-00-803-0490
NSN 5910-01-375-6036
NSN 6685-00-507-3302
NSN 6135-00-315-1187
NSN 5950-00-153-8452
NSN 5925-01-607-7712
NSN 6685-01-182-9494
NSN 5910-01-165-2896
NSN 5999-01-068-4445
NSN 5999-01-588-6852