Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 657 1503 103F found under Light Indicator by Dialight Corporation. The National Stock Number assigned to this part is 6220016095866, 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 657 1503 103F.