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 6240-00-231-0761
NSN 6645-01-312-8601
NSN 5950-01-475-3509
NSN 5985-01-141-6835
NSN 6645-01-062-0905
NSN 6645-01-253-1950
NSN 5950-00-278-1201
NSN 5925-01-261-9043
NSN 6685-00-273-8733
NSN 5905-00-010-3012
NSN 5998-01-557-9611
NSN 4140-01-439-5029