Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 76587A found under Nut Plain Hexagon by Marine Engine Specialties Div Of. The National Stock Number assigned to this part is 5310004992078, 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 76587A.