Is this a special E-clip size wise?
John, fears of an E-clip falling out are kinda unwarranted. Maybe if it were undersized and over-hardened it might...still only might. It is no more likely to happen than a screw falling out imo..... maybe less so.
A snug fit will grip and spin with the axle, and long term wear should then be on the trust surface of the bearing where it belongs. If it is stamped, put the sharp edge facing the wheel so it doesn't scrape the thrust surface of the 🐻....oops...bearing. Chamfering endges smoothly is really best though.
