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 6240-01-382-3756
NSN 6320-01-270-1419
NSN 5985-01-577-9520
NSN 5925-00-687-1625
NSN 5920-01-495-1268
NSN 6220-01-438-5392
NSN 5945-01-390-2021
NSN 5935-00-190-7517
NSN 5975-01-340-5774
NSN 5920-01-360-8310
NSN 5950-00-571-6097
NSN 5855-00-763-2155