I was washing my’12 specialized stumpjumper. When shaking it/drying it off, a screw/bolt came off and I can’t find where it belongs and don’t know what it is. It has threads inside and fits a small3mm Allen key. It’s 6 mm long, about 5 mm wide at the top. I usually do basic maintenance so didnt think I was so clueless but I can’t recognize this item, can someone help me?
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Fits a 3 mm Allen key, about 6 mm long and 5 mm wide across the top. It fell off as I was bouncing the bike to get some water off, can’t say where from the bike it might have come from