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RT3152 Trailer suspension shackle bolt is designed for securing compatible leaf springs to trailer hanger brackets or suspension equalizers. Measuring 9/16 inch in diameter and 3 inches long, it is commonly used with 1-3/4-inch-wide double-eye leaf springs on compatible trailer suspensions. This component helps secure the suspension assembly and maintain the proper connection between its moving parts. Verify the bolt dimensions, thread specifications and spring width before ordering. Confirm whether the retaining nut is included, as packaging may vary by supplier.