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 5990-01-121-1175
NSN 5855-01-452-7389
NSN 5999-00-162-4353
NSN 5975-01-052-5059
NSN 5960-01-331-3817
NSN 6240-01-530-7485
NSN 6110-01-382-8543
NSN 6105-01-086-5287
NSN 6320-00-389-4756
NSN 5945-01-360-4300
NSN 6135-01-201-5858
NSN 5950-01-325-4501