Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number N405P11B11 found under Washer Lock by Ward Leonard Electric Company Inc. The National Stock Number assigned to this part is 5310002748715, and the Federal Supply Class is 5310 Nuts And Washers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like N405P11B11.