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 4140-00-431-3830
NSN 5998-01-250-2887
NSN 6150-01-030-1037
NSN 5950-01-495-0873
NSN 7035-01-459-7545
NSN 6240-00-624-8440
NSN 5895-00-953-0782
NSN 6240-00-269-3346
NSN 5975-01-238-1134
NSN 5998-01-603-8140
NSN 2925-01-111-2927
NSN 4140-01-434-8238