Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number O406D found under Tape Measuring Repl by Apex Tool Group Llc. The National Stock Number assigned to this part is 5210005403778, and the Federal Supply Class is 5210 Measuring Tools Craftsmens. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like O406D.