National Stock Number
4320-01-633-1638
National Stock Number (NSN) 4320-01-633-1638, or NIIN 016331638, (housing section,liquid pump) was assigned November 12, 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 4 manufacturer part numbers associated with this NSN. 2 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 2 suppliers. Today, one supplier is listed as an Active supplier 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 Nov 13, 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) 53118. [A PARTIAL ENCLOSURE WHICH COVERS AND PROTECTS SELECTED INTERNAL COMPONENTS OF A PUMP, (AS MODIFIED). THIS ITEM MAY FUNCTION AS THE IMPELLER CASING, ROTOR HOUSING, PUMP END COVER, OR THE LIKE. IT MAY ALSO INCLUDE THE INTAKE AND/OR OUTLET PORT(S). FOR COMPLETE HOUSINGS, SEE HOUSING, LIQUID PUMP OR HOUSING, MOTOR-PUMP, HYDRAULIC. FOR OTHER PARTIAL ENCLOSURES, SEE COVER, HYDRAULIC PUMP-MOTOR AND HEAD, HYDRAULIC PUMP-MOTOR.]. 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 4320016331638 does not contain precious metals.
This NSN is associated to Schedule B 8413919520: parts, nesoi, of pumps for liquids. The Schedule B End Use is listed as industrial engines. NAICS classification category 333911: pump and pumping equipment manufacturing.
This information was last updated on Jul 01, 2025.