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 6220-00-959-5970
NSN 6620-01-462-5196
NSN 5910-01-096-1946
NSN 5998-01-384-2611
NSN 6240-01-099-2472
NSN 5930-00-531-0541
NSN 5985-01-613-6802
NSN 6645-00-998-7820
NSN 5996-00-814-7376
NSN 5998-01-010-6966
NSN 6145-01-186-3532
NSN 7035-00-585-2113