One side has pressure sensitive adhesive per mil-p-19834b
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 5990-00-005-5215
NSN 5965-01-459-7311
NSN 5930-00-839-9080
NSN 6105-01-563-3171
NSN 6620-01-265-0632
NSN 5999-00-843-8022
NSN 6220-01-426-1693
NSN 5925-01-039-2230
NSN 7035-01-010-4257
NSN 5999-01-659-9486
NSN 5930-01-392-3139
NSN 5920-01-422-1866