National Stock Number
5640-01-540-7423
National Stock Number (NSN) 5640-01-540-7423, or NIIN 015407423, (sound controlling felt) was assigned May 31, 2006 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.
There is only one manufacturer part number associated with this NSN. None of the associated part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by one supplier. Today, one supplier is listed as an Active supplier for this NSN. Of the active suppliers, only one supplier is deemed design controlled or valid supply parts.
This part number has not been procured by the US Government in over 5 years.
This NSN is assigned to Item Name Code (INC) 20229. [A FLEXIBLE OR SEMIRIGID MATERIAL COMPOSED OF ONE OR MORE KINDS OF FIBER WITH AN ADDED BINDER, MANUFACTURED IN FLAT SHEETS OR ROLLS. IT IS DESIGNED TO ENTRAP AND DISSIPATE SOUND ENERGY, AND MUST BE RATED FOR THIS USE.]. This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. 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 5640015407423 does not contain precious metals.
This information was last updated on Jul 01, 2025.