size boltSize W 3/16 0.1875 1.39 1/4 0.25 3.09 5/16 0.3125 4.72 3/8 0.375 6.73 7/16 0.4375 12.77 1/2 0.5 15.85 5/8 0.625 31.06 3/4 0.75 48.8 1/4 0.25 3.04 5/16 0.3125 4.56 3/8 0.375 6.75 7/16 0.4375 11.39 1/2 0.5 16.01 5/8 0.625 30.66 3/4 0.75 47.8 1 1 120.07 M3 0.11811 0.32 M4 0.15748 0.67 M5 0.19685 0.99 M6 0.23622 2.08 M8 0.314961 4.65 M10 0.393701 10.42 M12 0.472441 14.8 M14 0.551181 21.62 M16 0.629921 29.06 M20 0.787402 53.94