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 5910-01-370-5931
NSN 5990-01-348-9829
NSN 4140-01-207-3577
NSN 5925-01-596-7682
NSN 6240-01-171-0374
NSN 5910-01-512-8782
NSN 5990-00-061-3360
NSN 7035-01-284-5043
NSN 5950-01-273-4273
NSN 6645-01-578-6815
NSN 5998-01-140-5498
NSN 2925-00-200-0085