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 5945-01-020-9877
NSN 5855-01-609-1598
NSN 6610-01-583-4364
NSN 5915-00-104-9960
NSN 4140-01-351-3892
NSN 5925-01-543-2640
NSN 5945-01-398-0785
NSN 6220-01-055-7423
NSN 6620-00-087-7930
NSN 6240-00-274-4028
NSN 6135-01-142-6456
NSN 5998-01-593-8732