Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 6407-15400-011 found under Repair Kit Tail Rot by Sikorsky Aircraft Corporation. The National Stock Number assigned to this part is 1615008955408, 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 6407-15400-011.