Important-agency name and code number must appear as part of the indicia in the upper right corner below postage paid statement; this may not be handwritten, typewritten, or rubber stamped; only a machine printing process is acceptable by the u.S. Postal service; there are no restrictions as to method of application of the return address; only the requirement that a complete government agency return address be placed above the words official business and penalty statement
An envelope, usually made of a paper product. The face may be plain or preprinted with or without an open or glassine address window. The closure may be a gummed flap or a button and string fastener. When required a smaller envelope may be glued on the right face of the larger envelope. The interior may have a printed opaquing design and/or contain chipboard insert(s). It is designed for mailing correspondence/letters; records, or exposed and developed radiographic film. Excludes envelope, photographic negative; envelope, radiographic film mount, dental; and envelope, transparent.
Classification: Envelopes of paper or paperboard, of a kind used in correspondence
NSN 6650-00-423-2178
NSN 5905-01-543-2306
NSN 6620-00-453-4537
NSN 6650-01-420-0233
NSN 5985-01-427-3734
NSN 5855-00-862-3345
NSN 5960-01-221-4087
NSN 5910-01-299-1316
NSN 6150-00-682-4865
NSN 7035-01-291-1770
NSN 5905-01-634-0595
NSN 6650-00-320-8683