Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TD1040 found under Gage Screw Pitch by Snap On Tools Corp. The National Stock Number assigned to this part is 5210013351618, 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 TD1040.