National Stock Number
4240-01-357-3998
National Stock Number (NSN) 4240-01-357-3998, or NIIN 013573998, (protector,hearing) was assigned April 22, 1992 in the Federal Logistics Information System (FLIS). NIIN 013573998 was cancelled on May 2, 1999, with a cancelled status of "Item is Cancelled as Duplicate." This NSN was replaced by NSN 4240014495058. This NSN does not replace any other NSNs.
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.
This NSN is assigned to Item Name Code (INC) 42204. [AN ITEM CONSISTING OF TWO EARCUPS, EACH OF WHICH ARE FILLED WITH SOUND ATTENUATING MATERIAL. IT IS DESIGNED TO COMPLETELY COVER THE WEARER'S EARS AND PROTECT THEM FROM HIGH INTENSITY SOUND. IT MAY INCLUDE A HEADBAND OR IT MAY BE DESIGNED FOR MOUNTING ONTO HEADWARE, SUCH AS A HELMET. FOR ITEMS CONTAINING EARPHONES, SEE HEADSET, ELECTRICAL AND HEADSET-MICROPHONE. FOR ITEMS DESIGNED TO BE INSERTED INTO THE EAR, SEE PLUG, EAR.]. 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 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 4240013573998 contains an unknown precious metal.
This information was last updated on Aug 01, 2025.