New Products

High-Strength Hex Bolts

High-strength hex bolts are among the most widely used fasteners in mechanical equipment, heavy structures, and infrastructure. These high-strength hex bolts are manufactured from high-quality alloy steel through rigorous heat treatment (quenching and tempering). They feature a standard hexagonal head, facilitating high-precision, high-torque tightening using open-end wrenches, box wrenches, or socket wrenches. In wind turbine generators, pressure pipeline flanges, metallurgical equipment, and bridge joints, they convert torque into preload, creating a powerful clamping effect on the connection. Compared to ordinary bolts, high-strength hex bolts maintain more stable connection reliability under dynamic and impact loads, making them an irreplaceable fastening solution for many critical components.

Product Description

High-strength hex bolts are among the most widely used fasteners in mechanical equipment, heavy structures, and infrastructure. These high-strength hex bolts are manufactured from high-quality alloy steel through rigorous heat treatment (quenching and tempering). They feature a standard hexagonal head, facilitating high-precision, high-torque tightening using open-end wrenches, box wrenches, or socket wrenches. In wind turbine generators, pressure pipeline flanges, metallurgical equipment, and bridge joints, they convert torque into preload, creating a powerful clamping effect on the connection. Compared to ordinary bolts, high-strength hex bolts maintain more stable connection reliability under dynamic and impact loads, making them an irreplaceable fastening solution for many critical components.

Product Feature

High Strength and Toughness: Performance grades cover 8.8, 10.9, and 12.9, with grade 12.9 achieving tensile strengths exceeding 1220 MPa and yield strengths exceeding 1080 MPa, while maintaining sufficient elongation after fracture and impact energy absorption to prevent brittle fracture.

Excellent torque transmission efficiency: The hexagonal head has precise dimensions across the flats, and the transition radius between the head and shank is optimized to reduce stress concentration, making the head less prone to cracking or deformation under high preload.

Thread accuracy and fatigue resistance design: The thread is rolled to 6g or 6h accuracy, with a smooth transition at the root after rolling, resulting in a fatigue life 30%~50% higher than machined threads. Fine threads are optional, improving anti-loosening effect and adjustment accuracy.