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 6645-01-223-2402
NSN 6130-01-511-5331
NSN 5935-00-187-4294
NSN 6645-00-810-7229
NSN 6135-00-145-8884
NSN 5935-01-273-9131
NSN 5920-01-090-4363
NSN 5835-01-031-7265
NSN 5930-01-326-1852
NSN 6240-01-549-6400
NSN 6240-01-245-8996
NSN 5915-01-521-2953