Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1F0057 found under Block Compressor Cy by Caterpillar Inc. The National Stock Number assigned to this part is 2530006283121, 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 1F0057.