Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 45-590073 found under Wrench Wing Attachi by Hawker Beechcraft. The National Stock Number assigned to this part is 5120003030974, and the Federal Supply Class is 5120 Hand Tools Nonedged Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 45-590073.