Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number EH34 found under Drilling Machine Upright by Challenge Machinery Co The. The National Stock Number assigned to this part is 3413006312443, and the Federal Supply Class is 3413 Drilling And Tapping Machines. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like EH34.