NOMINAL TUBE DIMENSION CHART (BWG)

Selecting Tube Gauge / Thickness and OD values below calculates Nominal Tube ID. (bottom right corner of results)

Please reference our Pop-A-Plug Size Chart for tube plug sizes.

TABLE TO DETERMINE NOMINAL TUBE ID’S - BIRMINGHAM WIRE GAUGE (BWG)
Wall thickness Tube OD (in/mm)
BWG Decimal in/mm 3/8 1/2 5/8 3/4 7/8 1 1 1/8 1 1/4 1 3/8 1 1/2 1 5/8 1 3/4 2 2 1/2
9.53 12.70 15.88 19.05 22.23 25.40 28.58 31.75 34.93 38.10 41.28 44.45 50.80 63.50
8 0.165" 0.045" 0.170" 0.295" 0.420" 0.545" 0.670" 0.795" 0.920" 1.045" 1.170" 1.295" 1.420" 1.670" 2.170"
4.190 1.14 4.32 7.49 10.67 13.84 17.02 20.19 23.37 26.54 29.72 32.89 36.07 42.42 55.12
9 0.148" 0.079" 0.204" 0.329" 0.454" 0.579" 0.704" 0.829" 0.954" 10.79" 1.204" 1.329" 1.454" 1.704" 2.204"
3.760 2.01 5.18 8.36 11.53 14.71 17.88 21.06 24.23 27.41 30.58 33.76 36.93 43.28 55.98
10 0.134" 0.107" 0.232" 0.357" 0.482" 0.607" 0.732" 0.857" 0.982" 1.107" 1.232" 1.357" 1.482" 1.732" 2.232"
3.400 2.72 5.89 9.07 12.24 15.42 18.59 21.77 24.94 28.12 31.29 34.47 37.64 43.99 56.69
11 0.120" 0.135" 0.260" 0.385" 0.510" 0.635" 0.760" 0.885" 1.010" 1.135" 1.260" 1.385" 1.510" 1.760" 2.260"
3.050 3.43 6.60 9.78 12.95 16.13 19.30 22.48 25.65 28.83 32.00 35.18 38.35 44.70 57.40
12 0.109" 0.157" 0.282" 0.407" 0.532" 0.657" 0.782" 0.907" 1.032" 1.157" 1.282" 1.407" 1.532" 1.782" 2.282"
2.770 3.99 7.16 10.34 13.51 16.69 19.86 23.04 26.21 29.39 32.56 35.74 38.91 45.26 57.96
13 0.095" 0.185" 0.310" 0.435" 0.560" 0.685" 0.810" 0.935" 1.060" 1.185" 1.310" 1.435" 1.560" 1.810" 1.310"
2.410 4.70 7.87 11.05 14.22 17.40 20.57 23.75 26.92 30.10 33.27 36.45 39.62 45.97 58.67
14 0.083" 0.209" 0.334" 0.459" 0.584" 0.709" 0.834" 0.959" 1.084" 1.209" 1.334" 1.459" 1.584" 1.834" 2.334"
2.110 5.31 8.48 11.66 14.83 18.01 21.18 24.36 27.53 30.71 33.88 37.06 40.23 46.58 59.28
15 0.072" 0.231" 0.356" 0.481" 0.606" 0.731" 0.856" 0.981" 1.106" 1.231" 1.356" 1.481" 1.606" 1.856" 2.356"
1.830 5.87 9.04 12.22 15.39 18.57 21.74 24.92 28.09 31.27 34.44 37.62 40.79 47.14 59.84
16 0.065" 0.245" 0.370" 0.495" 0.620" 0.745" 0.870" 0.995" 1.120" 1.245" 1.370" 1.495" 1.620" 1.870" 2.370"
1.650 6.22 9.40 12.57 15.75 18.92 22.10 25.27 28.45 31.62 34.80 37.97 41.15 47.50 60.20
17 0.058" 0.259" 0.384" 0.509" 0.634" 0.759" 0.884" 1.09" 1.134" 1.259" 1.374" 1.509" 1.634" 1.884" 2.384"
1.470 6.58 9.75 12.93 16.10 19.28 22.45 25.63 28.80 31.98 35.15 38.33 41.50 47.85 60.55
18 0.049" 0.277" 0.402" 0.527" 0.652" 0.777" 0.902" 1.027" 1.152" 1.277" 1.402" 1.527" 1.652" 1.902" 2.402"
1.240 7.04 10.21 13.39 16.56 19.74 22.91 26.09 29.26 32.44 35.61 38.79 41.96 48.31 61.01
19 0.042" 0.291" 0.416" 0.541" 0.666" 0.791" 0.916" 1.041" 1.166" 1.291" 1.416" 1.541" 1.666" 1.916" 2.416"
1.070 7.39 10.57 13.74 116.92 20.09 23.27 26.44 29.62 32.79 35.97 39.14 42.32 48.67 61.37
20 0.035" 0.305" 0.430" 0.555" 0.680" 0.805" 0.930" 1.055" 1.180" 1.305" 1.430" 1.55" 1.680" 1.930" 2.430"
0.890 7.75 10.92 14.10 17.27 20.45 23.62 26.80 29.97 33.15 36.32 39.50 42.67 49.02 61.72
21 0.032" 0.311" 0.436" 0.561" 0.686" 0.811" 0.936" 1.061" 1.186" 1.311" 1.436" 1.561" 1.686" 1.936" 2.436"
0.810 7.90 11.07 14.25 17.42 20.60 23.77 26.95 30.12 33.30 36.47 39.65 42.82 49.17 61.87
22 0.028" 0.319" 0.444" 0.569" 0.694" 0.819" 0.944" 1.069" 1.194" 1.319" 1.444" 1.569" 1.694" 1.944" 2.444"
0.710 8.10 11.28 14.45 17.63 20.80 23.98 27.15 30.33 33.50 36.68 39.85 43.03 49.38 62.08
23 0.025" 0.325" 0.450" 0.575" 0.700" 0.825" 0.950" 1.075" 1.200" 1.325" 1.450" 1.575" 1.700" 1.950" 2.450"
0.640 8.26 11.43 14.61 17.78 20.96 24.13 27.31 30.48 33.66 36.83 40.01 43.18 49.53 62.23
24 0.022" 0.331" 0.456" 0.581" 0.706" 0.831" 0.956" 1.081" 1.206" 1.331" 1.456" 1.581" 1.706" 1.956" 2.456"
0.560 8.41 11.58 14.76 17.93 21.11 24.28 27.46 30.63 33.81 36.98 40.16 43.33 49.68 62.38