Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A11M-A20-TF found under Amplifierelectronic Control by Gps Source Inc. The National Stock Number assigned to this part is 5996016830113, 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 A11M-A20-TF.