Professional high-strength 10.9 grade black hexagon screws and bolts with round, pan and semi-round head designs, available in M2 and M4 metric sizes. Engineered for heavy-duty industrial fastening, these precision-machined fasteners deliver exceptional tensile and shear strength, perfect for industrial machinery assembly, heavy-duty equipment fixing and structural hardware installation. The durable black oxide finish provides reliable anti-rust and wear resistance, while the standard hexagon drive ensures stable torque application—an essential industrial-grade fastener for professional assemblers and machinery maintenance teams.
Core Premium Features
10.9 Grade High-Strength Steel: Industrial-grade strength rating with superior tensile and shear resistance, designed for heavy-duty load-bearing and high-torque fastening scenarios, far more durable than standard grade fasteners.
Triple Head Design: Round/pan/semi-round head options for diverse industrial needs—pan head for flush surface mounting, round/semi-round head for enhanced bearing pressure and stable structural fixing.
Black Oxide Coating: Durable anti-rust and wear-resistant finish, suitable for industrial workshop, machinery room and indoor heavy-duty equipment use, long-lasting performance without easy corrosion.
Standard Hexagon Drive: Precision hexagonal recess fits universal hex wrenches, no slippage or head stripping during high-torque installation, easy to apply and adjust for professional assembly.
M2 & M4 Metric Sizes: Compact industrial-spec sizes, ideal for small heavy-duty components, machinery parts, precision equipment and structural hardware fastening in industrial settings.
Wide Application Scenarios
Ideal for industrial machinery assembly & repair, heavy-duty equipment fixing, structural hardware installation, precision mechanical component fastening, industrial tool assembly and factory equipment maintenance. Perfect for securing machine frames, heavy-duty brackets, industrial fixtures, precision instrument parts and load-bearing hardware—these 10.9 grade fasteners are the professional choice for industrial engineers, machinery technicians and factory assembly teams.
Practical Industrial Advantages
Heavy-Duty Reliability: 10.9 grade strength ensures stable performance under high load and vibration, no deformation or loosening for long-term industrial use, reducing maintenance frequency.
Precision Machining: Burr-free uniform threads and accurate dimensional tolerance ensure tight, seamless fit with tapped holes and nuts, avoiding thread jamming in professional assembly.
Durable Surface Protection: Black oxide coating provides double protection against rust and wear, adapting to the harsh environment of industrial workshops and machinery operation.
Universal Compatibility: Standard hexagon drive and metric M2/M4 specs match universal industrial tools and hardware accessories, no need for custom parts, improving assembly efficiency.
Why Choose Our 10.9 Grade Hexagon Screws & Bolts?
We adhere to strict industrial manufacturing standards for every high-strength fastener, from premium 10.9 grade steel raw material selection to precision thread machining, head shaping and black oxide finishing. The triple head design and M2/M4 industrial sizes solve the pain point of high-strength fastening for small industrial components, while the 10.9 grade strength and durable finish deliver unbeatable reliability for heavy-duty industrial use. These fasteners balance high strength, precision and durability—providing a professional, long-lasting fastening solution for all your industrial machinery and heavy-duty hardware needs.
