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 5975-00-475-2407
NSN 5990-01-413-2405
NSN 5930-01-363-0274
NSN 5960-00-087-5454
NSN 6220-01-158-2871
NSN 5985-00-011-7532
NSN 6150-00-233-6356
NSN 4140-01-478-2409
NSN 6645-01-519-2732
NSN 5905-00-700-5871
NSN 5855-00-688-9954
NSN 2925-01-251-5725