Maximum Strength Construction - Forged from premium 12.9 grade alloy steel, these M8 screws deliver exceptional tensile strength and durability for heavy-duty industrial applications requiring superior load-bearing capacity Advanced Corrosion Resistance - Black oxide coating provides reliable protection against rust and wear, ensuring long-lasting performance in demanding environments and outdoor conditions Extra-Length Design - Features 8mm diameter with 55mm thread length (63mm total length) and 1.25mm pitch, ideal for thick materials and deep assembly applications requiring extended reach High-Torque Hex Drive - 6mm Allen socket enables secure tool engagement and powerful tightening capability, minimizing stripping risk during installation in heavy machinery and structural projects Industrial 10-Pack - Perfect for construction frameworks, heavy equipment manufacturing, automotive chassis, and machinery where extended length and maximum strength are essential Engineered for the most demanding industrial applications, these M8 x 55mm socket head cap screws provide exceptional strength and extended reach for heavy-duty projects.

Manufactured from 12.9 grade alloy steel - these bolts offer superior load-bearing capacity and shock resistance for critical structural connections and thick material assemblies.

The protective black oxide coating creates a durable barrier against corrosion and wear, making these screws suitable for both indoor industrial environments and outdoor applications exposed to harsh weather conditions.

The extended 55mm thread length provides substantial engagement for extra-thick materials, deep structural assemblies, and applications requiring significant clamping distance.

Technical Specifications:

Thread Diameter: 8mm

Thread Length: 55mm

Total Length: 63mm

Pitch Size: 1.25mm

Head Diameter: 13mm

Head Height: 8mm

Drive Size: 6mm Hex Socket

Professional Applications Include:

Heavy machinery and industrial equipment manufacturing

Structural steel frameworks and construction projects

Automotive chassis and suspension systems

Manufacturing equipment and production line machinery

Agricultural implements and heavy equipment

Commercial building frameworks and support structures

The socket head design allows for flush installation in counterbored holes, while the 6mm hex drive accommodates standard Allen keys for secure, high-torque installation.

Each screw is precision-machined to ensure consistent thread engagement and reliable clamping force under extreme loads and vibration.

Package includes 10 pieces of M8 x 55mm socket head cap screws - providing ample quantity for professional installations requiring extended length fasteners in structural and heavy-duty industrial applications.