Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 73-51850 SIMONDS found under File Hand by Kipper Tool Company. The National Stock Number assigned to this part is 5110002397556, and the Federal Supply Class is 5110 Hand Tools Edged Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 73-51850 SIMONDS.