Probably an off cut on it's way to the scrapyard. Worth $1.70-2 there, $50 plus $16 shipping on eBay and you didn't even have to dumpster dive for it. If I was to have it machined I'd go for a radial bore for a locking bolt and have the sharp edges chamfered.?
A friend who?worked at the big GE turbine factory told me a story of a machinist who used $1k a foot turbine shaft axle stock to make himself exercise weights.
