Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A3B640 found under Leg Release Tube An by Oro Manufacturing Company. The National Stock Number assigned to this part is 1680002250603, and the Federal Supply Class is 1680 Miscellaneous Aircraft Accessories And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like A3B640.