We often forget to tighten the locking screw for the sliding dinette table, resulting it falling to the floor sometime while towing. Also, I never quite liked the rough end of the screw digging straight into the wood underneath the table. After a huge design effort, I settled on jamming two 1/4-20 nuts together on the end of the screw. This keeps it from backing entirely out and spreads the load a little when tightened.
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