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 6150-01-139-3158
NSN 4140-01-442-8479
NSN 2925-00-735-4979
NSN 6220-00-932-4083
NSN 5925-01-140-1114
NSN 6645-01-349-6632
NSN 6610-01-393-5475
NSN 5999-00-952-6635
NSN 5905-01-516-4665
NSN 5925-01-387-9630
NSN 4140-01-600-1540
NSN 5999-01-352-3371