These are standard sizes of aluminum 6061-T6 (61S-T6) round aluminum tubing stocked by most aluminum suppliers or distributors in the United States and Canada.
OD
Wall Thickness
ID
Approximate Weight (lb)
(in.)
(in.)
Stubs Gauge
(in.)
per ft
per 12' length
3/16
0.035
no. 20
0.117
0.019
0.228
0.049
no. 18
0.089
0.025
0.330
1/4
0.035
no. 20
0.180
0.027
0.324
0.049
no. 18
0.152
0.036
0.432
0.058
no. 17
0.134
0.041
0.492
5/16
0.035
no. 20
0.242
0.036
0.432
0.049
no. 18
0.214
0.047
0.564
0.058
no. 17
0.196
0.055
0.660
3/8
0.035
no. 20
0.305
0.043
0.516
0.049
no. 18
0.277
0.060
0.720
0.058
no. 17
0.259
0.068
0.816
0.065
no. 16
0.245
0.074
0.888
7/16
0.035
no. 20
0.367
0.051
0.612
0.049
no. 18
0.339
0.070
0.840
0.065
no. 16
0.307
0.089
1.068
1/2
0.028
no. 22
0.444
0.049
0.588
0.035
no. 20
0.430
0.059
0.708
0.049
no. 18
0.402
0.082
0.948
0.058
no. 17
0.384
0.095
1.040
0.065
no. 16
0.370
0.107
1.284
5/8
0.028
no. 22
0.569
0.061
0.732
0.035
no. 20
0.555
0.075
0.900
0.049
no. 18
0.527
0.106
1.272
0.058
no. 17
0.509
0.121
1.452
0.065
no. 16
0.495
0.137
1.644
3/4
0.035
no. 20
0.680
0.091
1.092
0.049
no. 18
0.652
0.125
1.500
0.058
no. 17
0.634
0.148
1.776
0.065
no. 16
0.620
0.160
1.920
0.083
no. 14
0.584
0.204
2.448
7/8
0.035
no. 20
0.805
0.108
1.308
0.049
no. 18
0.777
0.151
1.810
0.058
no. 17
0.759
0.175
2.100
0.065
no. 16
0.745
0.199
2.399
1
0.035
no. 20
0.930
0.123
1.467
0.049
no. 18
0.902
0.170
2.040
0.058
no. 17
0.884
0.202
2.424
0.065
no. 16
0.870
0.220
2.640
0.083
no. 14
0.834
0.281
3.372
1 1/8
0.035
no. 20
1.055
0.139
1.668
0.058
no. 17
1.009
0.228
2.736
1 1/4
0.035
no. 20
1.180
0.155
1.860
0.049
no. 18
1.152
0.210
2.520
0.058
no. 17
1.134
0.256
3.072
0.065
no. 16
1.120
0.284
3.408
0.083
no. 14
1.084
0.357
4.284
1 3/8
0.035
no. 20
1.305
0.173
2.076
0.058
no. 17
1.259
0.282
3.384
1 1/2
0.035
no. 20
1.430
0.180
2.160
0.049
no. 18
1.40
0.260
3.120
0.058
no. 17
1.384
0.309
3.708
0.065
no. 16
1.370
0.344
4.128
0.083
no. 14
1.334
0.434
5.208
*0.125
1/8"
1.250
0.630
7.416
*0.250
1/4"
1.000
1.150
14.823
1 5/8
0.035
no. 20
1.555
0.206
2.472
0.058
no. 17
1.509
0.336
4.032
1 3/4
0.058
no. 17
1.634
0.363
4.356
0.083
no. 14
1.584
0.510
6.120
1 7/8
0.508
no. 17
1.759
0.389
4.668
2
0.049
no. 18
1.902
0.350
4.200
0.065
no. 16
1.870
0.450
5.400
0.083
no. 14
1.834
0.590
7.080
*0.125
1/8"
1.750
0.870
9.960
*0.250
1/4"
1.500
1.620
19.920
2 1/4
0.049
no. 18
2.152
0.398
4.776
0.065
no. 16
2.120
0.520
6.240
0.083
no. 14
2.084
0.660
7.920
2 1/2
0.065
no. 16
2.370
0.587
7.044
0.083
no. 14
2.334
0.740
8.880
*0.125
1/8"
2.250
1.100
12.720
*0.250
1/4"
2.000
2.080
25.440
3
0.065
no. 16
2.870
0.710
8.520
*0.125
1/8"
2.700
1.330
15.600
*0.250
1/4"
2.500
2.540
31.200
* These sizes are extruded; all other sizes are drawn tubes.
Information derived from the 78th edition of the ARRL Handbook 2001, Copyright, 2000.
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