Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number C61-5001-003 found under Knob by Andrea Electronics Corporation. The National Stock Number assigned to this part is 5355004863394, 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 C61-5001-003.