Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 7W4426 And 3N7616 found under Transmitter Tachometer by Caterpillar Inc. The National Stock Number assigned to this part is 6620001641493, and the Federal Supply Class is 6620 Engine Instruments. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 7W4426 And 3N7616.