looking for hex nut

So i went to swap out my front suspension and noticed my hex nut on the front suspension (bottom) is gone... the bolt seems to be firm in place and not moving and for some reason i can't seem to find the exact one to replace it with. does anyone have an idea where i could find this? the local auto parts store didn't have anything that fit. we tried a 14mm and 16 mm one too big one too small. do they make a 15? but they said the threads were different than anything they carried.

 

Try a hardware store. They'll have more of a variety of diameters and thread pitches. Trial and error.

 

Try a ace hardware store... they have more metric option typically.

 

Looks like the other one is ready to fall off also, and bolt is backing out.

 

Dang that is scary. I think my bolts had red loctite on from the factory so I made sure to add a couple drops when I did my suspension.

Edit: Yep, confirmed. Red loctite. Snug it up, lower the truck to the ground, bounce, and tighten to 61ft/lb.

 

How does that bolt just fall off?

 

Toyota part number bolt, wash, and nut. 90105-A0113, 901178-A0058, 91622-A41400 it is 15mm. Googled it.

 

Not installed correctly, or reuse of a single torque bolt.