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 5990-01-292-6000
NSN 6220-00-577-1986
NSN 6110-01-139-3528
NSN 5930-01-190-9685
NSN 6145-01-658-9099
NSN 6610-01-478-9183
NSN 5985-01-047-5236
NSN 5960-01-515-4791
NSN 4140-01-224-0435
NSN 6620-00-778-7405
NSN 6650-01-055-6168
NSN 5975-00-938-3794