National Stock Number
4240-01-052-9902
National Stock Number (NSN) 4240-01-052-9902, or NIIN 010529902, (cover,exhalation va) was assigned December 23, 1977 in the Federal Logistics Information System (FLIS). NIIN 010529902 was cancelled on June 2, 2016, with a cancelled status of "Item is Cancelled - USE." This NSN was replaced by NSN 4240011699036. This NSN replaces 1 stock number, 4240003009669.
There are 2 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 2 suppliers. Today, 2 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, 2 suppliers are deemed design controlled or valid supply parts.
This part number has not been procured by the US Government in over 5 years.
Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Jun 11, 2020, this NSN's acquisition method was noted as: Acquire directly from the actual manufacturer, whether or not the prime contractor is the actual manufacturer. This part is a commercial/non-developmental/off-the-shelf-item. Valid AMCs: 1, 2, 3, 4 and 5.
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 4240010529902 contains an unknown precious metal.
This information was last updated on Jul 01, 2025.