Heavy-Duty 12.9 Alloy Steel: Manufactured from high-grade 12.9 alloy steel, these M5 screws deliver maximum tensile strength and reliability for demanding structural and machinery applications Advanced Corrosion Protection: Black oxide finish provides superior resistance to rust and wear, ensuring long-lasting performance in various environments and conditions Extended 100mm Length: The substantial thread length offers exceptional clamping capability for thick materials, deep assemblies, and structural framing projects Precision Hex Socket Design: 4mm Allen drive enables secure tool engagement and high-torque installation while reducing the risk of head stripping during tightening Industrial-Grade 10-Pack: Suitable for professional workshops and manufacturing applications - perfect for machinery repair, automotive frames, and equipment manufacturing Engineered for demanding industrial applications, these M5 x 100mm socket head cap screws provide exceptional strength and reliability where standard fasteners fall short. Crafted from premium 12.9 grade alloy steel -they offer superior load-bearing capacity and shock resistance. The protective black oxide coating creates a durable barrier against corrosion and wear, making these screws suitable for both indoor and outdoor applications. With their extended 100mm length and fully threaded design, they're ideal for securing thick materials, structural components, and heavy machinery parts. Technical Specifications: Thread Diameter: 5mm Head Diameter: 8.5mm Head Height: 5mm Screw Length: 100mm Hex Drive Size: 4mm Perfect for numerous heavy-duty applications including: Industrial machinery and equipment manufacturing Automotive frame construction and repair Structural supports and metal framing CNC router tables and 3D printer frames Commercial equipment maintenance Heavy-duty jigs and fixtures The socket head design allows for flush installation in counterbored holes, while the 4mm hex drive accommodates standard Allen keys for secure installation. Each screw is precision-machined to ensure consistent thread engagement and reliable clamping force. Package includes 10 pieces of M5 x 100mm socket head cap screws - providing ample quantity for professional installations and industrial repair projects.