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Excavator Pin Bushing Construction Machinery Parts Hardened Steel Bushing. Customized Hardness: Hardness can be customized to meet specific requirements. Customized Material: Available in GCr15, 45#steel, and other materials upon request. ISO 9001 Certification: Certified with ISO 9001:2015 and TS16949 standards. High Hardness Range: Hardness reaches 52-60HRC after heat treatment. Wide Temperature Range: Operates effectively from -100 to +350 degrees Celsius. Cross Oil Groove Design: Features machined cross oil grooves for improved lubrication. Free Samples Available: Standard product samples are free, express costs refundable. Strict Quality Control: Comprehensive inspection during production and before packing.