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 5960-00-104-5955
NSN 5930-00-887-0752
NSN 6650-01-583-8302
NSN 6620-01-631-0700
NSN 6240-01-118-6398
NSN 5925-00-468-2757
NSN 6145-01-433-2329
NSN 5920-01-479-9605
NSN 5965-01-205-3088
NSN 6320-00-845-3261
NSN 5945-01-651-8654
NSN 6620-01-653-9727