Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2A40631A found under Nut Plain Square by Motorola Ltd. The National Stock Number assigned to this part is 5310003431500, 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 2A40631A.