Lightweight rings: 17-20 in/lb on ring and base screws.
Steel fixed rings: 30 in/lb bottom screw, 20 in/lb top screw.
Steel screw lock detachable and quick release ring: 6-48 bottom screws 30 in/lb, 10-32 screw 35 in/lb, top screws 20 in/lb.
Steel Bases: 20-25 in/lb