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 5990-01-463-2279
NSN 5998-01-375-7859
NSN 6130-01-058-4519
NSN 5920-01-157-9471
NSN 5935-01-391-8037
NSN 5950-01-312-8406
NSN 6320-01-029-4220
NSN 6240-00-686-5345
NSN 5990-00-617-1422
NSN 5905-01-074-5440
NSN 5925-00-536-7651
NSN 6685-01-158-9427