8.8 grade galvanized carbon steel hexagonal screws high strength extended half thread bolts

Product Advantages: Its core strength stems from the perfect combination of material (carbon steel), construction (half-thread), and head shape (external hexagon). The diameter of the bolt's smooth shank (unthreaded portion) is essentially the same as the nominal diameter of the thread, meaning it's not "weakened." The thread root is a weak point where stress concentrates. When subjected to transverse shear and alternating loads, the smooth shank distributes the load more evenly, avoiding stress concentration at the thread root, significantly improving shear resistance and fatigue life.

Product Selling Point: When your connection point is subject to lateral forces or vibration, the smooth shank of our half-thread bolts offers far superior shear strength and fatigue resistance than fully threaded bolts, fundamentally improving connection reliability. Not only is it sturdy, but the smooth shank also acts as a locating pin, ensuring quick and precise alignment of components during assembly, improving product quality and assembly efficiency. We comply with international standards and offer a comprehensive range of specifications for immediate availability.

Product Applications: 1. Building steel structures: beam-column connections, hinge points (exposed to shear forces).
2. Heavy Machinery: Mining machinery, agricultural machinery, press bases (withstand vibration and shock).
3. Automotive Industry: Chassis suspension, wheel connections, engine mounts (require high strength and fatigue resistance).
4. Precision Equipment and Molds: Equipment frames, mold positioning (require precise alignment).
5. Rail Transit: Rail vehicles, signaling equipment (require high reliability and corrosion resistance).