Hexagonal Nuts. Zinc Plated. Pack Quantity 20F83: M5 Standard nut F82: M6 Standard nut F81: M8 Standard nut F311: M10 Standard nut F312: M12 Standard nut F313: M8 Nylock F314: M10 Nylock F315: M12 Nylock. Hexagonal nuts zinc plated. Pack of 20.. nuts hex and nylon locking