Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 387 16 51 found under Wheel Retains by Columbia Machine Inc. The National Stock Number assigned to this part is 2530011373627, 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 387 16 51.