Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A57P0122-2 found under Insulator Plate by Mcdonnell Douglas. The National Stock Number assigned to this part is 5970012750976, and the Federal Supply Class is 5970 Electrical Insulators And Insulating Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like A57P0122-2.