Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AA4920-8503-2940 found under Bar Pair Blade Posi by Forway Industries Inc. The National Stock Number assigned to this part is 4920002370729, 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 AA4920-8503-2940.