Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 9-42917 found under Wrench Box And Open End Combinat by Sears Roebuck And Co. The National Stock Number assigned to this part is 5120010547131, 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 9-42917.