Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1856840 found under Guide Helical Gear by Walter Motor Truck Co. The National Stock Number assigned to this part is 2920003638306, and the Federal Supply Class is 2920 Engine Electrical System Components Nonaircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1856840.