Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number E7-5173 found under Pipe Exhaust by Harvard Industries Inc. The National Stock Number assigned to this part is 2990004276246, and the Federal Supply Class is 2990 Miscellaneous Engine Accessories Nonaircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like E7-5173.