Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B3954-55318 found under Insulator Plate by Selex Es Limited. The National Stock Number assigned to this part is 5970004684893, 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 B3954-55318.