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.
Estonia 
Singapore 
Australia 
France 
Germany 
United Kingdom 
Netherlands Classification: Gaskets,washers & other seals
NSN 5960-01-413-3877
NSN 5998-01-109-8407
NSN 6650-01-248-2591
NSN 6135-00-009-4100
NSN 5855-01-356-5284
NSN 6320-01-054-3046
NSN 4140-01-160-8934
NSN 5990-01-425-2175
NSN 5965-01-449-2239
NSN 5910-01-130-9483
NSN 5925-01-172-4571
NSN 5935-01-651-9350