Hexagon Socket Round Head Long Bolt

Knurled Hexagon Socket Bolt – High-Performance Fastener for Precision Assembly

The knurled hexagon socket Bolt is a precision-engineered fastening solution designed for demanding industrial and DIY applications where reliability, ease of installation, and durability are critical. Featuring a unique combination of a knurled head for superior grip and a hexagonal recessed drive for accurate torque application, this bolt delivers exceptional performance across diverse environments—from automotive assembly to heavy machinery and consumer electronics.

Engineered with high-grade materials such as stainless steel, alloy steel, and carbon steel, these bolts offer excellent corrosion resistance, mechanical strength, and long-term stability. Whether you're working in humid conditions, chemical processing facilities, or outdoor construction projects, the surface treatments—including zinc plating, hot-dip galvanizing, and Dacromet—ensure protection against wear and environmental degradation. Available in metric coarse, fine, UNC, UNF, and other thread types, along with multiple strength grades (from 4.8 to 12.9), this fastener meets international standards like ISO, DIN, JIS, ASME, and more—making it ideal for global manufacturing needs.

Key features include a precisely machined knurled head that allows manual tightening even in tight spaces without tools, a hex socket that accepts standard Allen keys or sockets for consistent torque control, and customizable options including NYLOK locking threads, anti-seize coatings, or customer-specific finishes. Each unit undergoes strict quality checks at a production capacity of 400 million units per year, maintaining a defect rate of just 300 parts per million—a testament to its robust design and manufacturing excellence.

These fasteners are widely used in machinery assembly, vehicle chassis components, electrical enclosures, furniture manufacturing, and sports equipment. Their versatility makes them suitable for both professional engineers and skilled hobbyists seeking reliable, low-maintenance solutions. The inclusion of standardized labeling, bulk packaging, and compliance certifications like ISO9001, RoHS, REACH, and IATF16949 ensures seamless integration into regulated supply chains worldwide.

Customers consistently praise the bolt’s ergonomic design, which simplifies installation in confined areas, and its ability to maintain secure fastening under vibration and thermal stress. Many users highlight how the knurling reduces slippage during hand-tightening, while the hex socket prevents cam-out—offering peace of mind in critical applications.

Common questions often revolve around compatibility with different tools, customization possibilities, and whether they can be used in high-temperature or corrosive environments. Yes, they work seamlessly with standard hex keys and are available in heat-resistant grades; yes, custom sizes, materials, and finishes can be tailored based on engineering drawings; and yes, various surface treatments make them suitable for marine, agricultural, and industrial settings.

In summary, the knurled hexagon socket bolt stands out as an intelligent choice for modern assembly tasks requiring precision, durability, and user-friendly handling. With its blend of innovation, global compliance, and real-world performance, it remains a top-tier fastener for professionals and enthusiasts alike.

Product Categories : Bolt > Knurled Hexagon Socket Bolt