Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 387 11 18 found under Axle by Columbia Machine Inc. The National Stock Number assigned to this part is 2520011371153, and the Federal Supply Class is 2520 Vehicular Power Transmission Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 387 11 18.