Hexagon flange bolts with a recessed head and toothed face are bolts with a hexagonal head and a toothed flange face. The design of this bolt includes a recessed head and flange area with a toothed head that provides additional friction to prevent the bolt from loosening in a vibrating environment. They are commonly used where high clamping forces and anti-loosening characteristics are required.

Material: including carbon steel, alloy steel, stainless steel (such as 304, 316, 316L, etc.) and other materials, the specific selection depends on the working environment and application requirements.

Grade: The product grade is divided into A grade and B grade, as well as different mechanical properties grade (such as 4.8 grade, 8.8 grade, 10.9 grade,A2-70, etc.), these grades reflect the tensile strength, yield strength and other mechanical properties of the bolt. Different grades are suitable for different load bearing requirements and working environments.

Advantage:

1. Increased Surface Area: The flange face provides a larger contact area, which helps to spread the pressure during tightening and reduces damage to the joint. 2. Anti-loosening design: the design of the teeth in the head helps to keep the bolt tight in vibration environments and prevents it from loosening on its own. 3. Corrosion resistance: Depending on the manufacturing materials and surface treatment, they usually have very good corrosion resistance and are suitable for various environments . 4. High torque tolerance: due to the flange face design, these bolts can withstand higher torque, ensuring a strong connection. 5. Simplified assembly: thanks to the integrated flange face, no additional washers or gaskets are required, simplifying the assembly process .

Scope of 

application

1. Automotive industry: especially for frame fixing of trucks and heavy vehicles . 2. Building and Structures: used for connecting and fixing structural building elements such as bridges, pylons, etc. 3. machinery and equipment: used in mechanical engineering to fix machine parts, such as motors, pumps, etc.. 4. chemical and petroleum equipment: used for connecting and fixing equipment such as pipelines, storage tanks, etc. 5. railways and motorways: used in the infrastructure of railways and motorways.