Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 343-5687 found under Turbosupercharger E by Caterpillar Inc. The National Stock Number assigned to this part is 2950016439003, and the Federal Supply Class is 2950 Turbosupercharger And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 343-5687.