Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1983748 REV. A ITEM 37 found under Handset by L3 Communications Corp. The National Stock Number assigned to this part is 5965014914983, and the Federal Supply Class is 5965 Headsets Handsets Microphones And Speakers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1983748 REV. A ITEM 37.