Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 648Z1674-1 found under by Drs Training And Control Systems Llc. The National Stock Number assigned to this part is 5895012386540, and the Federal Supply Class is 5895 Miscellaneous Communication Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 648Z1674-1.