Material is vellumoid which is a trade name for a specific paper & glue product.
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 5945-01-089-3263
NSN 6145-01-430-3839
NSN 5930-00-412-0324
NSN 4140-00-472-1739
NSN 6240-01-103-3081
NSN 5996-01-143-5779
NSN 6105-01-398-1674
NSN 5930-00-907-2424
NSN 5945-01-518-8117
NSN 6240-01-461-8193
NSN 7035-00-500-7839
NSN 5965-01-328-7979