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 4140-00-128-8072
NSN 6150-00-205-6775
NSN 7035-01-153-1767
NSN 5945-01-440-7269
NSN 6110-00-030-8908
NSN 6320-01-266-7607
NSN 5925-01-221-8617
NSN 6645-01-142-2416
NSN 5950-01-572-1825
NSN 5990-00-698-3963
NSN 5985-01-050-8231
NSN 5975-01-580-2651