Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number F20G8011239-501 found under Extension Shaft by Dassault Aviation. The National Stock Number assigned to this part is 3040012611690, 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 F20G8011239-501.