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 4140-01-331-5974
NSN 6650-01-146-5000
NSN 5996-01-134-1566
NSN 6645-01-365-1511
NSN 6320-01-481-7322
NSN 6620-01-437-3146
NSN 5999-00-439-6547
NSN 5930-01-437-8581
NSN 5950-01-026-0902
NSN 5905-01-210-7267
NSN 5945-01-005-1445
NSN 5895-00-085-4416