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 5925-01-386-6188
NSN 4140-00-983-8048
NSN 5855-00-004-0904
NSN 5935-00-272-3520
NSN 5950-01-236-9942
NSN 5999-00-247-7991
NSN 5945-00-050-8471
NSN 5990-01-100-1840
NSN 5965-00-170-5254
NSN 6645-01-272-2501
NSN 6685-01-351-0195
NSN 6145-00-973-9202