Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 541-4438-004 found under Plate Counter Mount by Rockwell Collins Inc. The National Stock Number assigned to this part is 5999000018999, and the Federal Supply Class is 5999 Miscellaneous Electrical And Electronic Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 541-4438-004.