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 6150-01-502-6779
NSN 6320-01-326-1316
NSN 6645-01-615-9875
NSN 6220-00-731-9559
NSN 5920-01-153-2690
NSN 5999-01-203-1600
NSN 7035-01-619-5073
NSN 6150-01-289-2944
NSN 6145-00-828-2504
NSN 5905-01-555-4357
NSN 5905-00-518-5136
NSN 4140-00-572-2131