Made from alloy steel (certified heat treatment). This heavy duty style is made from forged one - piece steel. The replacement bolt kits are designed exclusively for the corresponding American Drill Bushing hoist rings listed below. Standard tolerance for inch is +/-.030. Standard tolerance for metric is +/-0.8mm. Metric dimensions are shown in millimeters. Metric bolt kits are available as special order. Please call for price and delivery. The replacement bolt kits contain bolt and retaining ring.
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