Must conform to mil-std-413
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 6620-01-633-8443
NSN 7035-01-433-4401
NSN 5930-01-065-5380
NSN 6145-00-161-0768
NSN 6650-00-958-7408
NSN 5985-01-088-7337
NSN 5960-01-295-8924
NSN 5965-00-905-6895
NSN 5935-00-588-4042
NSN 6135-00-347-0595
NSN 5950-00-068-2476
NSN 5895-01-569-7446