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 2925-01-511-2667
NSN 5998-00-388-0259
NSN 5925-00-231-3660
NSN 5950-00-035-8791
NSN 5950-00-161-3196
NSN 6105-00-071-8174
NSN 5915-01-491-1502
NSN 6130-01-008-2603
NSN 6685-01-329-4122
NSN 6105-01-020-8106
NSN 5925-00-862-6719
NSN 6130-01-106-2923