Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 13059579 found under Adapter Boresight by Swaim Machine Co Inc. The National Stock Number assigned to this part is 5120012676663, 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 13059579.