Crosby G209A 21t Alloy Screw Pin Shackle 1-3/8": Forged alloy steel, Quenched & Tempered, with alloy pins. Meets performance requirements of Grade 8 shackles. Working Load Limit permanently shown on every shackle. Hot-dip galvanized. Size 3/8 inch is mechanically galvanized. Shackles can be furnished proof tested with certificates to designated standards, such as ABS, DNV, Lloyds, or other certification. Charges for proof testing and certification available when requested at the time of order. Approved for use at -40 C (-40 F) to 204 C (400 F). Meets or exceeds all requirements of ASME B30.26 including identification, ductility, design factor, proof load and temperature requirements. Importantly, these shackles meet other critical performance requirements including impact properties and material traceability, not addressed by ASME B30.26. G-209A Screw pin anchor shackles meet the performance requirements of Federal Specification RR-C-271G, Type IVA, Grade B, Class 2, except for those provisions required of the contractor.