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 4140-01-033-1238
NSN 6685-00-212-4531
NSN 5985-01-108-9236
NSN 6320-01-498-4954
NSN 5905-00-892-1654
NSN 5950-01-019-4178
NSN 6645-01-381-6084
NSN 5835-01-654-1251
NSN 6620-01-128-4462
NSN 5960-00-372-4876
NSN 6220-01-219-6294
NSN 6320-01-630-7629