Somewhere along a recent ride, this tiny but unusual screw finally worked its way loose after innumerable nights of holding the handlebar secure while folded and standing in the garage. I had no idea what to even search for to replace it, but somehow my attempts alerted the algorithm to my need, and there is popped up in the middle of my social media feed. It arrived quickly at low cost, and screwed in easily, restoring my HSD's stability while stowed.