Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 553-6496-003 found under Regulator Voltage by Rockwell Collins Inc. The National Stock Number assigned to this part is 6110007642014, and the Federal Supply Class is 6110 Electrical Control Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 553-6496-003.