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 5960-01-434-5539
NSN 2925-01-444-2061
NSN 5999-01-445-9550
NSN 6145-00-916-2042
NSN 5975-01-264-3927
NSN 5998-01-438-9008
NSN 5996-01-493-9908
NSN 5915-01-256-8537
NSN 5855-01-158-2709
NSN 6145-01-417-9630
NSN 5999-01-100-2586
NSN 5930-00-903-5203