National Stock Number (NSN) 4820-00-342-6526, or NIIN 003426526, (valve,vent) was assigned January 1, 1963 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN replaces 2 stock numbers: 4730006134890, 4820003462702.
There are 7 manufacturer part numbers associated with this NSN. 5 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 9 suppliers. Today, 4 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, only one supplier is 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, with the most recent procurement date of May 14, 2019. There have been 2 contracts issued for this part number, with 2 awards given. The US Government has only awarded those contracts to one supplier. The last contract numbers awarded were: SPE7M319P3831, SPE7MC14M6002. The total value of the awarded contracts has been US$ 3,071.49.
This NSN is very common among different weapons systems, belonging to 31 different platforms.
There has been very little demand for this national stock number. The demand for this NSN originated from less than 5 countries. Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Feb 18, 2005, 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 requires engineering source approval by the design control activity in order to maintain the quality of the part. An alternate source must qualify in accordance with the design control activity's procedures, as approved by the cognizant Government engineering activity. Valid AMCs: 1, 2, 3, 4 and 5.
This NSN is assigned to Item Name Code (INC) 35935. [A VALVE DESIGNED TO RELIEVE INTERNAL PRESSURE FROM GEAR HOUSINGS, AUTOMOTIVE AXLES, DIFFERENTIALS, TRANSMISSIONS AND THE LIKE. MAY OR MAY NOT BE THREADED ON ONE END. FOR ITEMS WITH RELIEF PRESSURE RATINGS SEE VALVE (1), SAFETY RELIEF.]. This item does not have a nuclear hardened feature but does have other critical feature(s) such as tolerance, fit restriction or application. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 4820003426526 does not contain precious metals.
This NSN is associated to Schedule B 8481809050: other taps, cocks, valves, etc., nesoi. The Schedule B End Use is listed as industrial machines, other. NAICS classification category 332911: industrial valve manufacturing.
This information was last updated on Aug 01, 2025.