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 4140-01-032-7621
NSN 5985-01-492-7955
NSN 5925-01-131-5869
NSN 6650-01-415-5573
NSN 5910-01-379-4300
NSN 5935-00-168-9219
NSN 6650-01-319-8036
NSN 5855-01-284-7208
NSN 6620-01-653-7644
NSN 5960-00-615-0809
NSN 6135-00-477-8847
NSN 5920-00-665-1065