Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1AM56 found under Screwdriver Attachment Socket Wr by Grainger Div Of W W Grainger Inc. The National Stock Number assigned to this part is 5120002236986, 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 1AM56.