found a confusing bolt cleaning my parents' garage

What a remarkable bolt! Can it come and do my place when it's finished?

Ah, the old... lemmy switcharoo?
I have a new thing that I miss most :(
- Hold my torque wrench I'm going in.
- new
My first thought - aww, what a clever little bolt, and cute to boot!

ive seen these used sticking out of concrete, the bend acting as the anchor... then the wood is bolted to this.

J Bolts for concrete don't have a head on them. The bent part is embedded into the concrete and would never be turned. Forming a hex head would be a wasted extra production cost.
I could see but it seems like a washer would be a much easier way to do this rather than bending like that

Ugh, happens to me all the time when I get overconfident trying to hammer in bolts.

At my old job we had some of these on the wall for hanging our hardhats.

That is one of those right angle bolts for getting into tight places. Hang onto it because they cost about $15 each new. It is specially made to transfer the torque from the head around the 90 degree bend. Just line it up with the nut, slap a driver on there and go to town. I promise, it will be amazing and nothing bad will happen.

I read they’re doing a recall on the left bend one. The right bends are okay tho.

Peyronie’s disease. That can give painful erections.

It also gives amazing domain names: http://www.BentCarrot.com
- Risky click of day : ✅

Very strange, but looks prebent

get yourself an acyzelen torch and then you can get your very own prebent 90° bolt for thoose tight spaces

Could’ve been a makeshift hook. Or a lock pin/bolt (literally) for one of those simple gate latches.

someone decided to be funny a couple years ago. we will never know who, but i do suspect your dad.

Could be useful as an allen 🤔

This is the most likely reason. I made a few of these when a regular Allen/Hex key is needed in a larger size than what you have on hand.

Could be similar to DIN875 or DIN878, depending on who you ask https://www.scribd.com/document/81939727/Sonderschrauben-fur-den-Maschinenbau

das nenn ich mal vielseitig einsetzbare schrauben

That there is a doodad, not to be confused with a thingamajig.

I think you can buy similar screws here lol

Looks like a wallhook to me.

Your parents ever own a Lincoln SA welder? (Like an SA200 or 250.)