Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D8257-13 found under Resistor Adjustable by Bogue Systems Inc. The National Stock Number assigned to this part is 5905002800091, and the Federal Supply Class is 5905 Resistors. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like D8257-13.