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Standard Aluminum Tubing Sizes
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.

Here is an interesting story for you. Shortly after the Muslim terrorists attacked the United States on September 11, 2001, I began getting a lot of e-mail inquiries into available stocks of thick-walled aluminum tubing. Sure, it seemed strange, but I didn't think much of it. Then, a couple years later, news outlets began reporting increased activity detected by Iran and Iraq related to uranium enrichment using centrifuges. One of the things mentioned was the requirement of specialty aluminum tubing with thick walls. Since inquiries kept coming in, I began checking the IP addresses of the e-mails, and discovered that, indeed, all were originating from the Middle East, Africa, and Asia. I contacted the FBI about it and they sent an agent to my house to investigate. He asked a few questions, took my IP address list, and left. I never heard from him again, but within a couple weeks, no more such requests for aluminum tubing were received. Coincidence?

Aluminum Tubing Vendors

OD
(in.)		 Wall Thickness ID
(in.)		 Approximate Weight (lb)
(in.) Stubs Gauge 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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