Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4F3942 found under by Caterpillar Inc. The National Stock Number assigned to this part is 3805001645312, and the Federal Supply Class is 3805 Earth Moving And Excavating Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 4F3942.