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 6220-00-133-3317
NSN 6240-01-088-7629
NSN 5999-01-531-3210
NSN 6685-01-188-1604
NSN 4140-00-205-6491
NSN 5945-00-136-7013
NSN 6130-00-005-0271
NSN 2925-00-816-8765
NSN 6105-01-105-0042
NSN 4140-00-852-9567
NSN 6685-00-527-9489
NSN 6240-00-275-1950