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 5855-01-440-6614
NSN 5855-01-020-7982
NSN 5975-00-644-2813
NSN 6135-01-364-2738
NSN 6150-00-782-9815
NSN 5930-01-253-2985
NSN 6610-01-539-0014
NSN 4140-00-294-3654
NSN 6610-01-129-7865
NSN 5990-01-465-9235
NSN 5996-00-264-8929
NSN 5965-01-276-1070