Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 12446257 found under Sensor Anti Lock Br by First Electronics Corporation The. The National Stock Number assigned to this part is 2530014825641, and the Federal Supply Class is 2530 Vehicular Brake Steering Axle Wheel And Track Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 12446257.