Standard Wire Gauge SWG (SWG) Dia Thou (SWG) Dia mm Number Drill (Number Drill) Dia Thou (Number Drill) Dia mm Letter Drill (Letter Drill) Dia Thou (Letter Drill) Dia mm
24 22.00 0.56 31 120.00 3.05
25 20.00 0.51 32 116.00 2.95
26 18.00 0.46 33 113.00 2.87
27 16.40 0.42 34 111.00 2.82
28 14.80 0.38 35 110.00 2.79
29 13.60 0.35 36 106.50 2.71
30 12.40 0.32 37 104.00 2.64
31 11.60 0.30 38 101.50 2.58
32 10.80 0.27 39 99.50 2.53
33 10.00 0.25 40 98.00 2.49
34 9.20 0.23 41 96.00 2.44
35 8.40 0.21 42 93.50 2.37
36 7.60 0.19 43 89.00 2.26
37 6.80 0.17 44 86.00 2.18
38 6.00 0.15 45 82.00 2.08