Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R12 1-2 613 found under Resistor Variable W by Memcor Inc. The National Stock Number assigned to this part is 5905001925742, 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 R12 1-2 613.