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 2925-01-250-2731
NSN 6620-01-502-7105
NSN 6110-01-623-7816
NSN 5996-00-879-4654
NSN 5895-01-383-4853
NSN 5960-00-372-4876
NSN 6150-01-090-0982
NSN 6685-00-100-4753
NSN 6240-01-270-5998
NSN 5905-01-158-9017
NSN 5905-01-373-2946
NSN 5950-01-459-0124