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 4140-01-207-9567
NSN 5998-01-412-0336
NSN 5985-01-500-2258
NSN 5996-01-384-2115
NSN 5990-01-303-6110
NSN 5930-01-522-4201
NSN 6105-01-106-4157
NSN 5950-00-078-0590
NSN 6105-01-447-5129
NSN 5935-00-394-3726
NSN 6645-01-584-0892
NSN 6645-01-053-3185