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 2925-01-283-6740
NSN 5975-01-381-2763
NSN 6110-00-931-5444
NSN 6145-01-337-5554
NSN 5925-01-237-2501
NSN 5835-00-930-8500
NSN 6220-01-022-2813
NSN 6240-00-682-8315
NSN 5985-00-327-4755
NSN 5915-01-633-4219
NSN 6145-00-947-5883
NSN 5990-01-507-7495