Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 549 3612 003 found under Panel Electrical El by Rockwell Collins Inc. The National Stock Number assigned to this part is 5975015882802, and the Federal Supply Class is 5975 Electrical Hardware And Supplies. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 549 3612 003.