Drawing calls for material as metal with nbr but doesn't state type of metal.
No other part numbers with same form, fit, and function found.
A deformable material which prevents the passage of matter through the joint formed when two faces are joined. It may be metallic or nonmetallic, lubricated or impregnated, solid or hollow cross section. It may be made to any predetermined dimension and shape. Excludes flat disks, items made of felt material and items having joints. For round metal and plastic items with an aperture and a solid rectangular cross section, see washer, flat; shim; bearing, washer, thrust; and spacer ring. Excludes disk, valve; seal, nonmetallic angle; seal, nonmetallic channel; seal, nonmetallic special shaped section; shielding gasket, electronic; and ring, sealing jar.
NSN 5975-01-455-3951
NSN 6105-00-993-5244
NSN 6110-01-406-3623
NSN 5990-00-269-2226
NSN 5935-01-484-8511
NSN 6145-00-186-6291
NSN 5835-00-998-5757
NSN 5965-01-084-6921
NSN 5960-01-094-5958
NSN 6685-01-034-7210
NSN 5996-01-661-2131
NSN 6110-00-019-7576