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 6220-01-263-7281
NSN 5999-01-566-5445
NSN 5990-00-578-8850
NSN 5920-01-587-9083
NSN 5945-00-544-9858
NSN 6320-01-466-4175
NSN 6110-01-571-5157
NSN 5960-01-552-0862
NSN 6650-01-150-2595
NSN 5915-01-010-1562
NSN 6130-00-476-0564
NSN 4140-00-498-6867