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 5920-01-420-8580
NSN 5985-00-892-3312
NSN 5990-01-292-6000
NSN 6220-01-608-4272
NSN 6145-00-900-0317
NSN 5975-00-239-2364
NSN 5960-01-391-1308
NSN 6650-01-543-7048
NSN 6145-01-145-9889
NSN 2925-01-054-3190
NSN 7035-01-145-5059
NSN 6220-00-948-6544