The Hexagon Head Screw 86715943 secures front components like the front cover and guide in HC25 Hydraulic Rock Drills, where easy disassembly is important for maintenance. Generic hex screws are often low-grade (Grade 4.8) and strip easily, but this OEM screw is Grade 8.8 with a tensile strength of ≥800MPa. Its zinc-plated finish resists rust, and its standard hex head design allows for easy removal with common tools. It withstands vibration and requires replacement only if stripped or broken, simplifying front-end maintenance.