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Old 12-30-19, 09:30 PM
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Join Date: Dec 2019
Location: Southern California
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Bikes: 70's frame, newer parts

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The "epoxy trick" works the best. Get something that fits in the socket. Maybe a grade 8 bolt that you groud to a rough hexagon shape and use JB Weld to glue it in place. But first, remove every trace of any oil and dirt. After 24 hours the epoxy will be very hard. The JB Brand epoxy is good because it contains metal powder and cures hard.

If this fails then the last resort is to drill the bolt head. Use a drill that is just slightly smaller than the diameter of the bolt head. Drilling is 100% effective. To protect the aluminum parts, use a drill that is smaller than the bolt head but larger than the threaded part of the bolt. and be careful.
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