Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 7Y-4448 found under Cover Protective Du by Caterpillar Inc. The National Stock Number assigned to this part is 5340016010851, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 7Y-4448.