The Socket Head Screw 95421335 is used to secure critical structural components (e.g., housing, flange) in HC25 Hydraulic Rock Drills, where vibration resistance is paramount. Generic Grade 8.8 socket head screws often strip or break within 1000-1200 hours due to insufficient tensile strength. This OEM screw is manufactured to Grade 12.9 standards, with a tensile strength of ≥1220MPa and a phosphated surface for anti-loosening performance. Its precise head and thread dimensions ensure proper torque application, maintaining tightness even under high vibration.