Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 20 3566 found under Filament by A Vox Systems Inc. The National Stock Number assigned to this part is 5950011316437, and the Federal Supply Class is 5950 Coils And Transformers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 20 3566.