Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 311540 found under Shaft Straight by Worldwide Aeronautical Components. The National Stock Number assigned to this part is 3040015009896, and the Federal Supply Class is 3040 Miscellaneous Power Transmission Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 311540.