National Stock Number
4730-00-187-3593
National Stock Number (NSN) 4730-00-187-3593, or NIIN 001873593, (reducer,boss) was assigned January 1, 1961 in the Federal Logistics Information System (FLIS). NIIN 001873593 was cancelled on May 2, 2002, with a cancelled status of "Item is Cancelled as Duplicate." This NSN was replaced by NSN 4730008055100. This NSN replaces 3 stock numbers: 4730008169126, 4730008409244, 4730005857356.
There are no manufacturer part numbers associated to this NSN.
This part number has not been procured by the US Government in over 5 years.
There has been very little demand for this national stock number. The demand for this NSN originated from less than 5 countries.
This NSN is assigned to Item Name Code (INC) 23541. [A STRAIGHT FITTING HAVING A BOSS CONNECTION OF A DIFFERENT SIZE AT EACH END. BOTH CONNECTIONS HAVE EXTERNAL OR INTERNAL MACHINE THREADS (STRAIGHT THREADS OTHER THAN PIPE OR HOSE SERIES) AND ARE DESIGNED TO FACILITATE A GASKET, PREFORMED PACKING, WASHER, OR THE LIKE TO FORM A SEAL AT THE BOSS. EXCLUDES:BUSHING (AS MODIFIED).]. This item does not have a critical feature such as tolerance, fit restrictions or application. Nuclear hardness properties have not been determined (not valid for input). There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 4730001873593 contains an unknown precious metal.
This information was last updated on Aug 01, 2025.