Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 28D175 found under Universal Joint Nonvehicular by Apex Supply Co. The National Stock Number assigned to this part is 3010002522532, and the Federal Supply Class is 3010 Torque Converters And Speed Changers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 28D175.