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 5975-01-586-6978
NSN 6645-01-290-3930
NSN 6620-01-029-6706
NSN 2925-00-251-0105
NSN 5996-01-223-4665
NSN 6240-00-172-8451
NSN 5985-01-423-7712
NSN 5950-01-040-6327
NSN 4140-01-246-4267
NSN 6240-00-248-6517
NSN 6610-00-527-8892
NSN 5855-01-201-4857