Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A552052 found under Knob by Cec Vibration Products Inc. The National Stock Number assigned to this part is 5355013088389, and the Federal Supply Class is 5355 Knobs And Pointers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like A552052.