Those are supposed to be good replacements. I haven't used a Stihl in years and don't miss those flip caps at all. Hope they work well for you!
I've had many problems with the oil cap on my ms250. I have two other saws with those flip caps and the fuel cap on the 250 never give me trouble
I didn't get a flippy seated correctly and and when I flipped it it broke in two. Had to run home and swipe one from another saw.
Keep us posted how they work out. I have had a couple I had to replace and chances are there will be another one coming up in the future. This might be an option.
I tried the cheaper Stens version of the Husky flippers a few years back. Seemed like they used cheaper rubber for seal and they didn't seal as well. I went back to OEM. Have read much greif over Stihl's version through the years. Did they ever fix them?
Not a huge fan of them even though they are convenient. Sometimes they don't seat and lock correctly and end up finding out the hard way. Not fun spilling bar oil down your leg. Id probably replace with another Flippy if I broke one. Seems to never happen at a good time does it Kieth?