National Stock Number
4240-01-327-7880
National Stock Number (NSN) 4240-01-327-7880, or NIIN 013277880, (valve,antiback draft,protective shelter) was assigned October 21, 1990 in the Federal Logistics Information System (FLIS). NIIN 013277880 was cancelled on July 2, 2001, with a cancelled status of "Item is Cancelled WITHOUT Replacement." 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) 15648. [AN ITEM CONSISTING OF A METAL FRAME, TO WHICH IS ATTACHED A HINGED METAL FLAPPER PLATE. THE FLUCTUATING FLAPPER PLATE AUTOMATICALLY REGULATES THE PRESSURE BETWEEN THE OUTER AIR LOCKS AND THE ATMOSPHERE OF PROTECTIVE SHELTERS. EXCLUDES:DRAFT CONTROL, FLUE, AUTOMATIC.]. This item does not have a critical feature such as tolerance, fit restrictions or application. Nuclear hardness properties have not been determined (not valid for input). 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 4240013277880 does not contain precious metals.
This information was last updated on Jul 01, 2025.