Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number FR0 4 found under Recorder Fuel Gage by Assembly And Test Worldwide Inc. The National Stock Number assigned to this part is 2815012620755, and the Federal Supply Class is 2815 Diesel Engines And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like FR0 4.