Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4L1945 found under Coil by Caterpillar Inc. The National Stock Number assigned to this part is 2590009243054, and the Federal Supply Class is 2590 Miscellaneous Vehicular Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 4L1945.