Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ZT550052 found under Roller Bracket Stud by Zephyr Manufacturing Co Inc. The National Stock Number assigned to this part is 5130011270305, and the Federal Supply Class is 5130 Hand Tools Power Driven. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like ZT550052.