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 5925-00-466-7308
NSN 5855-00-494-9581
NSN 6145-01-157-2046
NSN 2925-01-351-9748
NSN 4140-01-361-2292
NSN 6610-00-478-7071
NSN 5996-00-277-7384
NSN 5935-00-036-1329
NSN 5990-01-591-8797
NSN 6320-01-578-6006
NSN 6240-01-229-1749
NSN 6135-00-297-8873