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Grade 30 proof coil chain is a general-purpose, low-carbon welded steel chain designed for non-lifting applications such as cargo securing, towing, farm fencing, and light-duty tie-downs. It undergoes a proof load test (hence “proof”) but has no defined safety factor for lifting—making it unsuitable and unsafe for overhead lifting or personnel support. Typically ungraded (not marked with “G30” in many markets), it offers cost-effective strength for static or low-dynamic loads, with common sizes from 3/16″ to 3/8″.
information to be updated
