Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1Z603774 found under Bearing Half Sleeve by Isotta Fraschini Motori Spa. The National Stock Number assigned to this part is 3120151159086, and the Federal Supply Class is 3120 Bearings Plain Unmounted. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1Z603774.