KOOTANS 2pcs/lot Zinc Alloy Flexible Pivot Joint Connector for Aluminum Extrusion Profile 3030 Series Slot 8mm

As described.

These are considerably cheaper than the versions from 80/20 and I suspect they're manufactured to lower tolerances. Considering the price, these are pretty good. I missed the part about the item being two pieces which means two complete pivots so I ordered two. Now I've got an extra set to help with filling up drawers in the shop.As another reviewer mentioned you can't torque the pivot screw down enough to keep the hinge from swinging with any sort of lever arm on it, owing to the tolerances and the likely risk of stripping out the pivot bolt which is only an M5. I'm going to try a plastic or thin rubber washer between the hinge ears and switch to a M5 hex screw to replace the evil phillips head and see if that helps. Absolute rigidity is not a requirement for my application so this is more tinkering around for me than anything.I had hoped to be able to slide one side of the pivot up and down a 3060 horizontal track and lock it wherever I wanted. The other end mounts to the end of a 3030 vertical member in my application. This is possible but the pivot has to be disassembled to loosen/tighten the screw that holds it to the track and T-nut as the pivot screw is in the way. This isn't a defect, it's just the way it is.However, 80/20 says that an M8x16mm socket head screw is what you need to tighten that part of the pivot that connects to a T-nut in the track at least for their version of the pivot. For this one, I found that a 16mm bottomed out hitting the back of the T-slot before the pivot was secured. I'm going to try a 14mm.

If you need something without much play...don't buy this hinge. With a 15" piece of extrusion, i swear this thing will move/flex a half a CM (side to side) with only a couple lbs of weight. I replaced a 3D printed part with this metal part thinking it would be better, no dice,

Used it to pivot mirrors

I am using this for making a desk light with aluminum extrusion. it works ok but beware! The only aluminum extrusion I found for sale on Amazon has a 6mm bore which can not accommodate M5 screws. The inside, smaller part of the joint has a narrow area that is unable to fit a regular size M6 screw head (the screw itself fits but the top wont). I had to buy special narrow head screws, and bend the aluminum for it to fit. One broke in the process. It is really tight because of the larger screw head tightly pressed on the joint hinge, which is ok for my purpose but not what it was designed for. The joint does not hold too tightly without this larger screw pressure. Overall they are decent and worked for what I was doing but I would buy diffrent ones for the future. I think it is important to know that if you are buying your 2020 aluminum extrusion on Amazon, then it is probably only suitable for M6 screws which these dont work for.A suggestion for the manufacturer would be to include M6 screws that fit in the smaller joint. I spent as much on 4 single overpriced specialty metric screws at the hardware store as I did on this product cost.

The screw used to hold the two pieces together was longer and protruded on one side. Compared to some of the other similar options by other vendors, this version also was missing hardware (screws and T Nuts) to mount it.