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 6650-01-057-2596
NSN 5960-01-043-8414
NSN 7035-01-453-9175
NSN 6240-00-703-6614
NSN 5985-00-498-5824
NSN 6105-00-539-0393
NSN 5925-01-127-7608
NSN 7035-01-176-7523
NSN 2925-01-027-1293
NSN 5905-01-353-9124
NSN 5930-01-468-5429
NSN 6610-01-457-1974