Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CS1C52DXA found under Flange Companion Nonvehicular Un by Kontro Co Inc The. The National Stock Number assigned to this part is 3010013689974, 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 CS1C52DXA.