Whether you're working on a car modification project or tackling everyday hardware fastening tasks, a reliable, versatile screw is essential—and our M10-1.25 hex flange fine-thread screws are built to deliver. Engineered to excel in both hardware applications (such as securing metal brackets, machinery components, or DIY woodworking projects) and car modification (fastening engine parts, chassis components, or body kits), these screws combine 10.9-grade strength, long-lasting rust protection, and a user-friendly design. Each pack contains 4 screws, and with 8 practical lengths (25mm to 90mm), they're the perfect choice for DIYers, professional mechanics, and hardware enthusiasts. The hex flange design is a standout feature for both use cases: the integrated flange acts as a built-in washer, evenly distributing pressure across the mounting surface to prevent damage. For car modification, this protects delicate parts like plastic body panels or aluminum brackets; for hardware tasks, it safeguards wood or metal surfaces from indentation. It also eliminates the need for separate washers, saving time during installation and reducing the hassle of lost or misplaced small parts. The hex head provides a secure grip with standard wrenches or socket tools, even in tight spaces—whether you're working in a cramped engine bay or a crowded hardware workshop. Strength is non-negotiable for fasteners that handle heavy use, and these screws don't disappoint. Crafted from 10.9-grade high-strength alloy steel, they boast a tensile strength of 1000MPa and a yield strength of 900MPa—far stronger than ordinary screws. This makes them capable of withstanding the rigors of both automotive and hardware use: resisting constant vibration (which loosens weaker fasteners in cars or machinery), sudden impacts (from road debris or hardware handling), and extreme temperature shifts (from engine heat to outdoor weather). Whether you're securing a car's suspension component or a heavy-duty hardware bracket, you'll eliminate the risk of loose or failing parts, ensuring long-term reliability. Rust and corrosion are major threats to any fastener, especially those exposed to moisture, oil, or outdoor elements. That's why every screw features a professional color-zinc plating. The coating is thick, uniform, and dense, exceeding industry standards to resist moisture, salt spray (ideal for coastal car owners), engine oil, and hardware-related chemicals. This protection keeps screws rust-free for years, maintaining their structural integrity and appearance—no more dealing with seized, corroded fasteners when servicing your car or adjusting hardware. We've tailored these screws to fit diverse needs: the M10-1.25 fine thread ensures precise engagement with compatible nuts and tapped holes, minimizing cross-threading or stripping (critical for both delicate auto parts and hardware) Every screw undergoes strict quality testing: thread precision checks for smooth installation, hardness tests to confirm strength, and surface inspections to eliminate burrs or defects. For hardware and car modification that's strong, durable, and convenient, these M10-1.25 hex flange fine-thread screws are the perfect solution.