Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AU73 found under Rotor Ignition Distributor by Unison Industries Llc. The National Stock Number assigned to this part is 2920003537267, 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 AU73.