Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 82781 found under Drive Shaft Assembl by Thor Power Tool Co Sub Of Stewar. The National Stock Number assigned to this part is 1615013905107, 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 82781.