National Stock Number
4210-00-375-1920
National Stock Number (NSN) 4210-00-375-1920, or NIIN 003751920, (proportioner,foam liquid,injecti) was assigned January 1, 1963 in the Federal Logistics Information System (FLIS). This NSN does not replace any other NSNs.
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 one supplier. 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.
This NSN is assigned to Item Name Code (INC) 20961. [AN ITEM DESIGNED FOR THE PURPOSE OF INJECTING A CAREFULLY CONTROLLED AMOUNT OF FOAM LIQUID INTO A HORIZONTAL FIRE MAIN OR FIRE HOSE LINE DEPENDING UPON THE FLOW OF WATER THROUGH THE MAIN OR LINE. IT CONSISTS OF A POSITIVE DISPLACEMENT ROTARY FOAM LIQUID PUMP DRIVEN BY A POSITIVE DISPLACEMENT ROTARY WATER MOTOR THROUGH A SOLID TYPE COUPLING. THE PUMP SUCTION IS CONNECTED TO A SOURCE OF FOAM LIQUID AND THE DISCHARGE IS CONNECTED TO THE DOWNSTREAM SIDE OF THE WATER MOTOR. FOR TANK TYPE PROPORTIONERS, SEE PROPORTIONER, FIRE EXTINGUISHING FOAM. EXCLUDES:GENERATOR, FOAM, PUMP.]. 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 4210003751920 does not contain precious metals.
This information was last updated on Aug 01, 2025.