National Stock Number
5340-00-525-6135
National Stock Number (NSN) 5340-00-525-6135, or NIIN 005256135, (plug,expansion) was assigned May 9, 1967 in the Federal Logistics Information System (FLIS). NIIN 005256135 was cancelled on June 2, 2006, with a cancelled status of "Item is Cancelled - USE." This NSN was replaced by NSN 5340000541412. 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) 03797. [A RELATIVELY THIN METALLIC ITEM, HAVING A CONCAVE OR CUPPED CONTOUR, DESIGNED TO EFFECT ITS OWN SEAL BY COMPRESSION AGAINST THE CIRCUMFERENCE OF A HOLE. IT IS USED AS A BLOWOUT PLUG IN BOILERS, ENGINES, AND THE LIKE TO RELIEVE THE PRESSURE CREATED BY THE EXPANSION OF FLUIDS CAUSED BY HEAT OR FREEZING.]. 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 5340005256135 contains an unknown precious metal.
This information was last updated on Aug 01, 2025.