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 5975-00-239-7347
NSN 5925-00-133-5365
NSN 5990-01-485-0260
NSN 5930-01-470-5444
NSN 5930-01-172-7612
NSN 5935-00-467-2847
NSN 6610-01-275-0119
NSN 6620-00-155-2608
NSN 5950-01-587-4668
NSN 6240-01-393-4039
NSN 6145-01-555-4409
NSN 6645-01-432-7026