National Stock Number
2540-01-553-1336
National Stock Number (NSN) 2540-01-553-1336, or NIIN 015531336, (clamo block spring) was assigned July 9, 2007 in the Federal Logistics Information System (FLIS). NIIN 015531336 was cancelled on February 2, 2009, with a cancelled status of "Item is Cancelled - USE." This NSN was replaced by NSN 5310015502143. This NSN does not replace any other NSNs.
There are 3 manufacturer part numbers associated with this NSN. None of the associated part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 3 suppliers. Today, 3 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, 3 suppliers are deemed design controlled or valid supply parts. ISO Group has several sources of supply for 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) 77777. 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 2540015531336 does not contain precious metals.
This information was last updated on Aug 01, 2025.