Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 548 3984 004 found under Mounting Base Elect by Rockwell Collins Inc. The National Stock Number assigned to this part is 5975015899625, 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 548 3984 004.