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 5985-01-553-5748
NSN 5985-00-273-1650
NSN 6150-00-989-0460
NSN 6150-00-808-9221
NSN 6135-01-010-0891
NSN 5960-01-364-1318
NSN 5950-00-814-8352
NSN 6650-01-559-2934
NSN 5975-01-418-1858
NSN 5960-01-012-4936
NSN 6135-01-010-0891
NSN 6685-01-205-3242