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 6145-00-899-6306
NSN 4140-00-620-9681
NSN 5930-00-554-1064
NSN 5990-01-016-0245
NSN 5855-00-118-8762
NSN 7035-00-763-6180
NSN 6150-00-188-2958
NSN 5910-01-423-5601
NSN 6130-01-431-5796
NSN 6650-01-468-4681
NSN 6645-01-372-9464
NSN 6240-01-630-2702