Hi: John here. I've attached a photo of a roller assembly from a roller assembly from my 47 x 92 aluminum frame sliding screen door. Door is probably original late 70's mid 80's 14 story residential building in Rockville MD. The rollers (4) are in similar condition, either original or replaced at the same time. They adjust for height with a long screw from the corner of the frame. One of the rollers is broken - the spring has separated from the base (looks like it was a simple press/friction fit and the axel pins have worn down so the roller wheel is off. Thought I might be able to make do with a B515 from Prime Line but the clearance between sides of the saddle that fits onto the block that is moved by the adjustment screw is too narrow. I'll replace all 4 if I find something that works. Any suggestions are greatly appreciated.
Forgot to mention, it's a 1 1/4" roller. Thanks