YFS 12.9 M3 Round Head Screw Package 20pcs

About Our High-Performance Screws

Our high-strength socket head cap screws are engineered to exceed international performance benchmarks and are manufactured to surpass the expectations typically associated with grade 12.9 fasteners. Built with precision and backed by advanced manufacturing techniques from Taiwan, these screws are trusted by professionals around the globe.

What sets these screws apart is a meticulous focus on three critical elements: premium-grade raw materials, controlled heat treatment processes, and rigorous in-house testing.

Only top-tier SCM435H alloy steel—sourced from leading Japanese steel producers like NIPPON STEEL and SUMITOMO METALS—is used to ensure durability from the inside out.

To maintain exceptional consistency, a fully automated heat treatment system (imported from Japan) is utilized. This system not only stabilizes the mechanical properties of each screw, but also ensures a uniform, blackened surface finish that resists wear and corrosion.

Each production batch undergoes comprehensive quality testing in a certified laboratory. Randomized inspections and documented results guarantee that the screws meet high performance standards and remain fully traceable.

Why Electroplated Nickel Makes a Difference

Electroplated nickel offers outstanding resistance to oxidation and corrosion due to its rapid formation of a protective passivation film in the presence of air. This natural barrier helps the surface withstand moisture, alkalis, and a variety of acidic conditions.

Additionally, the fine grain structure of nickel plating makes it highly polishable. When buffed, it achieves a mirror-like shine that holds up even under harsh environmental conditions.

Benefits of 12.9 Grade Screws

Grade 12.9 screws deliver exceptional tensile strength—up to 1220 MPa—and maintain a hardness rating of 39–44 HRC. Made from alloy steel (SCM435), they are ideal for demanding industrial applications, including hydraulic systems, injection molding equipment, textile machinery, and more.

Thanks to their superior strength-to-weight ratio and structural reliability, these screws are also a top choice for FPV drone frames, where both precision and endurance matter.