Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 91 AR1K-123A found under Resistor Variable N by Bi Technologies Corporation. The National Stock Number assigned to this part is 5905010578025, 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 91 AR1K-123A.