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 4140-01-302-9015
NSN 5996-01-032-4942
NSN 4140-00-203-4844
NSN 5915-01-093-0801
NSN 6130-01-440-7392
NSN 5985-00-187-8985
NSN 5905-01-166-1888
NSN 5996-01-576-9852
NSN 5930-01-007-1221
NSN 6610-01-010-4516
NSN 2925-00-468-5273
NSN 4140-01-041-8140