Din933 Carbon Steel Hex Bolt Black Oxide Hdg Hex Head Bolt

This product is a high-strength hexagon bolt connection set, consisting of bolts, nuts and matching washers. It is a core fastening connection component in the fields of steel structures and heavy machinery. It is made of high-quality carbon steel and undergoes precise heat treatment and surface anti-corrosion treatment. It can achieve long-term stable connection under heavy-load conditions and is a key basic component for ensuring the safety of large structures.

Excellent load-bearing capacity: The high-strength alloy steel material combined with the large hexagon head design offers superior tensile, shear and fatigue resistance compared to ordinary bolts, capable of withstanding extremely large axial and lateral loads, suitable for heavy-duty structural load requirements.

Precise pre-tightening control: Achieve precise pre-tightening through torque method or angle method, effectively forming frictional connections, avoiding structural slippage and loosening, and ensuring long-term safety and reliability of the nodes.

Strong corrosion resistance and durability: Provide various surface treatment options such as hot-dip galvanizing, blackening, and Dacromet coating. In harsh environments such as damp, corrosive, and high/low temperature conditions, it can maintain stable performance and significantly extend service life.

Wide installation compatibility: Equipped with standard nuts and washers, compatible with different thicknesses of steel structure components. The construction operation is convenient, suitable for various industrial-level assembly scenarios.

High quality stability: Produced strictly in accordance with national standards, with strong consistency in size accuracy and mechanical performance, and small batch-to-batch variations. It can meet the quality requirements of engineering batch assembly.

Structural Design: The large hexagon head design facilitates the application of torque wrenches and enables the transmission of greater preload force; the screw part is divided into full-thread and half-thread designs, which can meet different assembly depth requirements.

Material Properties: The core material is 8.8 grade, 10.9 grade or 12.9 grade carbon steel. After quenching and tempering treatment, it possesses high strength and good toughness, with outstanding resistance to impact and deformation.

Variety of Specifications: Multiple diameter (such as M16-M30) and length options are provided, covering different strength grades, allowing for flexible selection based on engineering load requirements.

Appearance Differentiation: There are black oxidation, silver-gray hot-dip galvanizing and other appearances, facilitating quick identification of strength grades and anti-corrosion types on-site, thereby enhancing construction management efficiency.

Building steel structure: Widely used in the beam-column joints of high-rise residences, large venues, and industrial plants, as well as the splicing of trusses. It is a key fastening component at the core load-bearing parts.

Bridge engineering: Suitable for the connection of steel box girders and steel truss girders of highway bridges and railway bridges. It can withstand alternating loads such as vehicle passage and wind force, ensuring the long-term stability of the bridge structure.

Power and communication towers: Used for the component splicing of transmission towers and communication base stations. In extreme conditions such as strong winds and earthquakes, it can still maintain connection reliability.

Heavy machinery manufacturing: Applied in the frame and chassis connections of mining machinery, lifting equipment, and construction machinery, bearing high-intensity vibration and impact, ensuring the safety of equipment operation.

Rail transportation: Serves the track support steel structure and vehicle body connection of subways and high-speed railways, meeting the strict requirements of high reliability and long lifespan for rail transportation.