Steve/IL,
You're correct the hardware store bearings indeed have a flange,
We in the bearing industry call them "unground" bearings,
99.9% are made in china!,
I'm not aware of nor have ever seen in over 40yrs in the industry euro/usa/uk even jap made versions,
They're used in brick cutting machines, golf buggys , hand trolleys, a multitude /numerous a/various applications, they're poorly made &don't last very long,
I end up convincing customers to buy sealed unflanged versions more $ yes but far&way outlast the flanged versions being fully sealed both sides or metal sheilded.