M5–M12 A2-70 304 Stainless Steel GB5787 Hexagon Head with Serrated Flange Cap Screw Hex Washer Head Bolt

M5–M12 A2-70 304 Stainless Steel GB5787 Hexagon Head with Serrated Flange Cap Screw — Hex Washer Head Bolt

A2-70 grade 304 stainless steel hex head serrated flange cap screws (hex washer head bolts) to GB5787 standard. The integrated serrated flange combines the function of a hex bolt and a toothed lock washer in a single component — the serrations bite into the workpiece surface when tightened, providing anti-loosening resistance without a separate washer. Corrosion-resistant 304 stainless steel for electronics, outdoor, and humid environments.

Key Specifications

Why Choose Serrated Flange Hex Bolts?

• Integrated serrated flange — eliminates separate lock washer; reduces parts count and assembly time
• Anti-loosening serrations — teeth bite into workpiece for superior vibration resistance
• A2-70 304 SS — corrosion-resistant for electronics, outdoor, and humid environments
• Hex head drive — high torque with standard hex wrenches and spanners
• M5–M12 range — covers light electronics to medium structural assembly

Typical Applications

• Motor and gearbox mounting (anti-loosening without separate washer)
• Aluminium extrusion profile assembly
• Electronics enclosure panel fastening
• 3D printer frame and motion system assembly
• Robotics and automation frame assembly

Package Contents

• GB5787 A2-70 304 SS hex serrated flange cap screws (quantity and size per selected variant)