Columbus McKinnon CM M646G Super Strong Screw Pin Shackle - 1/4", 3/4 Ton

All shackle pins are forged from alloy steel, heat treated and tempered to give greater strength. These shackles have higher working load limits than specified by Federal Specifications.

All shackles are marked with size (inches and millimeters) and working load limit in tons. Ultimate strength equals 6 times working load limit. Proof load equals 2.2 times working load limit. All bolt, nut & cotter shackles have thread protected ends. Galvanized per ASTM-A153.