Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 9999-43380 found under Control System Machinery And Shi by Engine Monitor Inc. The National Stock Number assigned to this part is 2090013550535, and the Federal Supply Class is 2090 Miscellaneous Ship And Marine Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 9999-43380.