Overview Reviews Product Description High tensile forged steelOversized screw pinHot dipped galvanized finishMeets federal specifications RR-C-271D, Type 4B & Class 26:1 safety factor Dynaline Catalog Product Videos Custom Field Product Reviews Write a Review Write a Review × Dynaline Screw Pin Chain Shackle 5/16" 66021 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *