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 5996-01-394-5768
NSN 5965-00-722-7574
NSN 5985-01-045-3924
NSN 5930-00-042-7036
NSN 5960-00-145-9361
NSN 5950-00-627-4359
NSN 5905-00-833-7659
NSN 6135-01-616-4950
NSN 5895-00-728-3655
NSN 6220-01-032-3684
NSN 5855-01-171-9841
NSN 4140-01-482-5038