Section R3VK R5VK R8VK Top Width Thickness Angle (mm) (mm) (Degree) 9.7 10.5 40 15.8 16.5 40 25.4 25.0 40 Pitch Manufacturing-range (mm) Minimum Maximum (inch/mm) (inch/mm) Length Designation 117 10.3 37.5” 17.5 63” 28.6 100” 350” La 630” La 826” La