Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number FEDSTD 307 SIN524 found under Truck Tractor by Navistar Intl Corp. The National Stock Number assigned to this part is 2320016926869, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like FEDSTD 307 SIN524.