China Bolt Manufacturers, Suppliers, Factory

Our factory specializes in producing Dacromet Coach Bolts, crafted from high-quality carbon steel. The bolt head is shaped as a semi-spherical dome, while the neck is square, with a Dacromet coating on the surface. When installed, the square neck clicks into the square hole of the workpiece, preventing the bolt from rotating with the nut, allowing for easy tightening by a single person. The Dacromet coating exhibits excellent salt spray resistance and is suitable for various applications. The bolt is available in strength grades of 4.8, 8.8, and 10.9, with standard sizes in stock and support for non-standard customization.

JINGHONG factory specializes in producing striking plastic expansion tubes with screws, made of high-quality polyethylene (PE) or nylon, and equipped with carbon steel galvanized self-tapping screws. The outer wall of the expansion tube features barbs and guide grooves, allowing it to be directly hammered into the wall without the need for an electric drill to expand the hole. It is widely used in various applications. The specifications range from 6mm to 10mm, and we have ample stock of regular sizes.

Our factory specializes in producing Dacromet Hex Flange Bolt, which is made of high-quality carbon steel with a hexagonal flange surface on the head and a Dacromet treatment on the surface. Replacing flat gaskets with flange faces increases the contact area, disperses pressure, and eliminates the need for a separate gasket insertion process. Dacromet coating has excellent salt spray resistance and is suitable for occasions with high requirements for rust prevention. Specifications and lengths can be customized according to needs, and strength grades of 4.8, 8.8, and 10.9 can be produced.

The 8.8 grade Hexagon Fit Shank Bolts are a type of high-strength mechanical fastener. They undergo quenching and tempering heat treatment to meet the 8.8 grade strength standard, and their surfaces are usually treated with blackening. The key feature of these screws lies in the presence of a precise threaded section in the middle. During installation, they adopt transitional or interference fits with the threaded holes, enabling precise positioning and gap-free connection of components. Compared to ordinary bolts, their lateral shear resistance is significantly stronger. They mainly rely on their own shear strength rather than pre-tightening friction to bear the shear force. This product is widely used in machine tools, automobiles, molds, and automation equipment, which have high requirements for position accuracy and shear-bearing capacity in critical connection parts.

Carbon steel/alloy steel automotive Car Wheel Bolts, classified according to strength grades 8.8/10.9/12.9, provide 60 ° conical, spherical, and planar contact types. The keyway and wheel hub hole are fitted with interference fit for precise positioning. Suitable for passenger cars, light trucks, and heavy trucks, high-strength material selection, anti loosening and rust prevention, stable and reliable road testing.

The stainless steel chemical anchor bolts are made of high-quality 304 stainless steel, featuring anti-corrosion and anti-oxidation properties. They are based on the principle of chemical bonding and curing, without generating expansion stress. They possess high tensile and shear strength, stable anchoring performance, and a long service life. They come in various specifications and are easy to install. They are widely used for post-installation anchoring and fixation of concrete, stone, and other substrates, and are applicable to curtain wall engineering, equipment fixation, structural reinforcement, and marine corrosive environments.