External hexagonal full tooth bolt is a common mechanical fastener, named after its hexagonal outer surface and all threads machined on the screw. With its unique structure and performance advantages, it is widely used in various fields such as machinery, construction, and electronic equipment. The specific introduction is as follows:
• Structural features
External hexagonal head: The bolt head is a regular hexagonal structure, which is easy to use tools such as wrenches and sockets for tightening and dismantling operations. This design can provide a larger force surface, apply greater torque, and ensure the tightness of bolt connections.
Full thread screw: The screw part is threaded from the bottom of the head to the tail of the bolt. The thread form is commonly metric triangular thread, which can tightly fit with the internal thread of the nut, increase the contact area of the connection, and improve the reliability and stability of the connection.
• Materials and Properties
Material type: There are various production materials, and carbon steel is a commonly used material, such as 4.8 grade and 8.8 grade bolts; Stainless steel materials (such as 304, 316) are suitable for environments with corrosion resistance requirements; Aluminum alloys, titanium alloys, and other materials are commonly used in aerospace and other fields that require strict weight and performance requirements.
Performance level: The bearing capacity and mechanical performance are distinguished by performance level identification, such as level 4.8, where "4" represents the ultimate tensile strength of the bolt material at 400MPa, and "8" represents the yield strength ratio (the ratio of yield strength to tensile strength) at 0.8. The larger the number, the higher the bolt strength.
Working principle: By utilizing the helix angle of the thread, the rotational torque is converted into axial tension. Through the mutual engagement between the nut and bolt threads, as well as the pressure generated by the bolt head and nut on the surface of the connected part, frictional force is formed to tighten two or more connected parts together, achieving a reliable connection.
• Application scenarios
Mechanical equipment: used in the assembly of machine tools, automobiles, motors and other mechanical equipment to connect various components, such as motor housings and bases, automobile engine cylinder blocks and cylinder heads, etc.
In the field of architecture, it is used to connect components such as steel beams and columns in steel structure buildings; In scenarios such as wooden structures and aluminum alloy door and window installations, external hexagonal full tooth bolts are also commonly used for fixation.
Electronic devices: Due to their full tooth design that provides uniform fastening force, they are commonly used for connecting electronic device casings and internal brackets to ensure the stability of internal components and prevent loosening due to vibration and other factors.
• Installation and usage precautions
Tool selection: Choose appropriate wrenches, sockets, and other tools according to the bolt specifications to avoid slipping or damage to the bolt head caused by improper tool size.
Torque control: According to design requirements and bolt performance levels, use a torque wrench to control the tightening torque to prevent bolt breakage caused by over tightening or connection instability caused by over loosening.
Environmental adaptation: In special environments such as humidity and corrosive gases, choose appropriate materials (such as stainless steel) for the external hexagonal full tooth bolts, and take protective measures to prevent bolt corrosion and failure.
Audited Supplier 
){kind=link}