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 5930-01-334-8177
NSN 5915-01-295-2264
NSN 6685-01-429-3274
NSN 6650-01-359-5385
NSN 5965-00-518-0958
NSN 6220-00-421-5472
NSN 6220-01-168-9383
NSN 6135-01-414-9810
NSN 5835-01-440-5391
NSN 5996-01-049-8986
NSN 6130-00-952-2970
NSN 5990-00-105-7831