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 4140-00-935-5360
NSN 2925-01-127-0167
NSN 6135-01-296-1860
NSN 6105-01-159-8313
NSN 6105-01-305-9118
NSN 5835-01-109-4775
NSN 6105-01-030-4405
NSN 5855-01-261-5495
NSN 6150-01-253-7408
NSN 5930-01-487-6597
NSN 5975-01-019-7873
NSN 5975-01-565-5528