Thickness : 16 mm Inner Thread : M 14 x 1.5 mm Quality/ Grade : 8 Spanner Size : 19 Outer Hexagon
Thickness : 18 mm Inner Thread : M 18 x 1.5 Quality : 10 Spanner Size : 24
Thickness/Strength: 18 mm Inner Thread: M16 x 1.5 mm Diameter: 28 mm Quality Grade: 10 Spanner size: 22