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 6150-00-516-6943
NSN 6320-00-456-2092
NSN 6685-01-357-8473
NSN 5915-01-114-5908
NSN 5945-00-702-7210
NSN 5950-01-013-9382
NSN 5990-00-258-0228
NSN 2925-01-412-9520
NSN 6620-01-391-6499
NSN 5975-00-142-2450
NSN 5965-01-442-5405
NSN 2925-01-121-3355