Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A73-301 found under by Dresser Industries Inc. The National Stock Number assigned to this part is 3820000205323, and the Federal Supply Class is 3820 Mining Rock Drilling Earth Boring And Related Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like A73-301.