Roller Adjustment Screws

Hi, I just ordered 16 Peachtree patio screen door rollers (84-028) to replace all 4 rollers on 4 separate screen doors. First, thanks for the prompt delivery. However, the screw that adjusts wheel height stripped in the plastic housing when minimal door pressure was applied. After a while sweating and trying to figure out why I could not adjust the wheel height I found I must replace the standard screws with wider screws that form a tighter fit. Unfortunately I don't have many of these screws. Can you suggest wider height adjustment screws to replace the ones that come with this part? I used some from the old rollers being replaced, but don't have enough for all 16 wheels. Thanks.