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 5985-01-539-3687
NSN 6135-01-285-1925
NSN 2925-01-159-8312
NSN 7035-01-339-5480
NSN 6130-01-288-5467
NSN 6145-01-492-6672
NSN 6150-00-046-2425
NSN 5925-01-037-8175
NSN 5996-01-426-6713
NSN 5910-00-331-9157
NSN 6645-01-539-2920
NSN 6110-00-709-2720