The plates that have no bar but have a little part that seats on the post right on the can have more parts and those parts vary wildly. There is usually some little cut out on the can or the cup the plate that holds the whole mess. Then the part that sits on the can... well it has a tab that fits the cut out on the can... That was the hard part when one wasn't done right. Then the tension disks go on. Then you will have a wide variety of cups or washers to go on next 2 of them have a cup with a bar for the pin to hit. Two have a cup with notches that seat on a little washer with a bar across the tension pin... Then the beehive goes on. Then you may have a nut with a cover for the cup and beehive or not. Then you may or may not have a little washer with a pointy thing to make the dial work if you have a dial OR you may have a nut. WILD.