National Stock Number
4930-01-633-9527
National Stock Number (NSN) 4930-01-633-9527, or NIIN 016339527, (vent unit,relief) was assigned December 10, 2014 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.
There are 14 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, there are no suppliers that 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 Dec 11, 2014, this NSN's acquisition method was noted as: Acquire directly from the actual manufacturer, whether or not the prime contractor is the actual manufacturer. The Government physically does not have in its possession sufficient, accurate, or legible data to purchase this part from other than current source(s). (NOTE: This code is applicable only to parts under immediate buy requirements and only as long as the deficiency is under review for resolution and appropriate recoding.) Valid AMCs: 1, 2, 3, 4 and 5.
This NSN is assigned to Item Name Code (INC) 35932. [A SPRING LOADED DEVICE EQUIPPED WITH AUTOMATIC PRESSURE AND VACUUM RELIEF VALVES TO RELIEVE DRUM STRUCTURE OF EXCESSIVE VAPOR PRESSURE BUILD-UPS AND PROVIDE FOR VACUUM RELIEF TO FACILITATE LIQUID FLOW. IT ALSO SERVES AS A FILLING UNIT WITH REMOVABLE CAP WITH CHAIN ATTACHMENT.]. The item is a non-aviation Critical Safety Item (CSI) whose failure will result in serious damage to equipment or serious injury or death to personnel. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 4930016339527 does not contain precious metals.
This information was last updated on Jul 01, 2025.