Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 7 311340091 found under Shaft Quill Tail Ro by Boeing Company The. The National Stock Number assigned to this part is 1615011717705, and the Federal Supply Class is 1615 Helicopter Rotor Blades Drive Mechanisms And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 7 311340091.