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 4140-01-264-4952
NSN 5895-00-152-5035
NSN 6105-01-610-2555
NSN 6220-01-498-7211
NSN 5975-00-299-1202
NSN 5998-01-268-6639
NSN 5996-00-504-6761
NSN 5990-01-074-2210
NSN 6645-00-887-0122
NSN 5950-00-935-2428
NSN 5930-01-441-8055
NSN 6145-00-988-3870