M4/M5/M6 304 stainless steel cross groove outer hexagon screw pocket hexagon bolt concave brain screw for Furniture & Equipment Fixing

Our 304 stainless steel cross groove outer hexagon screws are professionally engineered for secure, durable fastening across industrial, construction, and DIY scenarios. Crafted from high-grade 304 stainless steel, these bolts offer exceptional corrosion resistance, rust-proof performance, and wear resistance, making them suitable for indoor, outdoor, and even humid environments.

 

Featuring a cross groove (Phillips) design combined with an outer hexagon head, these screws enable easy installation with both Phillips screwdrivers and hex wrenches—providing versatility and convenience for professional workers and DIY enthusiasts alike. The concave brain (concave head) design ensures a flush, neat finish after installation, avoiding protrusions that could affect equipment operation or appearance.

 

Available in M4, M5, and M6 sizes, these screws are widely applied in industrial machinery assembly, furniture installation, construction projects, mechanical maintenance, and hardware fixing. Each screw undergoes strict quality inspection, with precise threading that guarantees a tight, anti-loosening fit, ensuring long-term stability and reliability.

 

Whether you’re assembling industrial equipment, installing furniture, repairing machinery, or completing DIY projects, these 304 stainless steel cross groove outer hexagon concave head screws deliver the strength, durability, and versatility needed for all your fastening needs.