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 5999-01-276-3854
NSN 6130-00-338-9448
NSN 5935-00-220-5330
NSN 5965-00-089-2712
NSN 6645-01-442-6476
NSN 7035-01-199-6915
NSN 5915-01-304-4048
NSN 5990-00-916-9163
NSN 5945-01-354-8786
NSN 5985-01-051-2796
NSN 5895-00-590-7984
NSN 5996-00-248-7061