Flow rail system and pallet stop apparatus

A conveyor system, comprising:

• a plurality of frame links, the plurality of frame links comprising a first frame link and a second frame link, the first frame link having a first top end, the second frame link having a second top end, wherein a first opening is formed in the first frame link at the first top end and a second opening is formed in the second frame link at the second top end;
• a bushing configured to interface with the first opening and the second opening, the bushing coupling the first frame link with the second frame link;
• and
• a roller engaged with the bushing, the roller comprising:
• a body, comprising:
• a first end;
• and
• a second end opposite the first end;
• an axle disposed in the body extending from the first end to the second end;
• a first end connector configured to interface with the axle on the first end, the first end connector protruding at least partially past the first end, the first end connector configured to engage with the bushing;
• and
• a spring configured to interface with the axle and the first end connector, wherein the spring is configured to provide a restoring force to the first end connector when depressed.