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 6645-00-106-0140
NSN 6610-00-441-7243
NSN 5930-01-457-8870
NSN 5965-00-938-2814
NSN 6610-00-137-6507
NSN 6145-01-103-3273
NSN 5975-01-423-1448
NSN 5990-01-254-3197
NSN 2925-01-224-1885
NSN 5930-01-577-1367
NSN 5835-01-631-7390
NSN 5960-00-136-7046