How tight are you supposed to screw in Renfroe screw-pin type safety clamps?
A. Screw in as tight as you can
B. Screw in as tight as you can then back off ¼ turn.
C. Stop screwing as soon as the pad contacts the plate
D. ¼ additional turn after the pad contacts the plate
Click on the ANSWER button to see if you are correct.
ANSWER: The correct answer is: D. ¼ additional turn after the pad contacts the plate as recommended by J.C. Renfroe & Sons Clamps. Most clamp manufacturers recommend hand tightening of screw clamps and not to overtighten.