Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AN3158-4 found under Light Navigational by Aeronautical Standards Group. The National Stock Number assigned to this part is 6220005833085, and the Federal Supply Class is 6220 Electric Vehicular Lights And Fixtures. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like AN3158-4.