Thread size July 8, 2019 16 32 64 128 Thread size chart Thread size 1/4-20 Thread size m20 Thread size m16 Thread size m2 Thread size 4-40 Thread size 1/4-28 Thread size m12 x 1.5 Thread size m8 Thread size by diameter Thread size 1/8 Thread size metric Thread size m5 Thread size 6-32 Thread size 3/8