Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number STN0004 found under Installation Tool Bearing Stakin by New Hampshire Ball Bearings Inc. The National Stock Number assigned to this part is 5120013887104, 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 STN0004.