Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 00855-501 found under Screw Ball Actuator by Skytronics Inc. The National Stock Number assigned to this part is 1680000248712, 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 00855-501.