I have 10 pipes that were to be used as cross braces for metal raised garden beds. I used a different method for support. They are painted green, about 34" long, and the OD is a little bit less than 1/2". Ends are threaded for a metric bolt. I don't know the bolt size or threading, but I have a number of bolts that fit, but maybe not enough for both ends of all the pipes.
In Ballard near the Goodwill store. preference given to requests with a specific date and time for pickup.
Steel Pipe with Bolt Threaded Ends (Ballard)
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