Mike, they kinda sorta fit. Ok, here is the deal. There is too much play in they once you get them on. If you look at pictures on bay that show the back side, you will see that their are 4 tabs and a metal ring. To get them to fit tight, I took the metal rings off and threw those away. Then, I took a lighter and heated the plastic tabs and bent them outwards slightly with a pair of pliers. Making sure to start the bend at the base of the cap. Not much bending is required to get a snug fit. I have had mine for about 6 months now with no problems.