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 4140-00-554-9221
NSN 6645-01-023-8020
NSN 7035-01-099-2311
NSN 6220-01-521-2720
NSN 6650-01-193-8983
NSN 5960-01-242-5297
NSN 6620-00-197-5130
NSN 5965-01-442-8980
NSN 5990-01-021-7303
NSN 6105-01-323-7679
NSN 5930-01-272-5510
NSN 6650-01-227-1632