Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 400-099-1 6853 found under Amplifier Subassemb by L 3 Communications Microdyne. The National Stock Number assigned to this part is 5996011556921, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 400-099-1 6853.