I've been sifting through a few gifted bins of LEGO with a small percentage of trash and clone-brands stuff. I've had pretty good luck with finding new and strange LEGO pieces on bricklink, but this one has me stumped.

I don't see LEGO printed anywhere on it. Another discouraging factor is on the bottom where I see numbers that would suggest it is not LEGO:

But it fits Technic pins perfectly so maybe it is something LEGO that I've never seen before:

So have I been lured in by some clone part or is this a real LEGO thing?