National Stock Number
5640-00-056-1791
National Stock Number (NSN) 5640-00-056-1791, or NIIN 000561791, (millboard,asbestos) has an unknown assigned date. NIIN 000561791 was cancelled on May 6, 1997, with a cancelled status of "Item is Cancelled - Inactive." There is no known replacement specified for this stock number. This NSN does not replace any other NSNs.
There are no manufacturer part numbers associated to this NSN.
This part number has not been procured by the US Government in over 5 years.
This NSN is assigned to Item Name Code (INC) 20231. [A BUILDING AND INDUSTRIAL BOARD CONSISTING OF ASBESTOS FIBERS AND BINDER COMPRESSED INTO SHEETS AND THESE SHEETS SIZED WITH VEGETABLE FIBER. THIS BOARD HAS NEITHER A THERMAL CONDUCTIVITY NOR A SOUND ABSORBING RATING. IT IS USED WHERE PRIMARY IMPORTANCE IS ATTACHED TO THE CHARACTERISTICS; FIRE RETARDENCY, RESISTANCE TO ACIDS, AND RESISTANCE TO HIGH TEMPERATURE FAILURE. EXCLUDES:INSULATION BOARD, THERMAL.]. There is no information in the HMIRS; however, the NSN is in an FSC in Table II of Federal Standard 313 and an MSDS may be required by the user. The requirement for an MSDS is dependent on a hazard determination of the supplier or the intended end use of the product. NSN 5640000561791 does not contain precious metals.
This information was last updated on Jul 01, 2025.