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evi1cheese [S] 2 points ago +2 / -0

For the ones that don’t know, it’s a screw that wasn’t treaded.

1
Sneker 1 point ago +1 / -0

Or maybe a Scrivet, used in some assembly manufacturing.

-1
webthing -1 points ago +1 / -2

That's a sex bolt.

look it up

another screw screws inside that one from the other end.