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External Hexagon Bolt
Dxternal hexagon bolt are bolts with a hexagonal head, widely used in machinery, construction, automobiles and other fields. They are characterized by six flat faces on the head, which can easily apply a large torque using a wrench.
Material Selection
Carbon steel: suitable for general mechanical connections, low cost.
Stainless steel: suitable for humid or corrosive environments, strong corrosion resistance.
Alloy steel: suitable for high strength and high temperature environments, excellent mechanical properties.
Surface treatment
Surface treatment of external hexagon bolt includes galvanizing, nickel plating, phosphating, painting, etc. to improve their corrosion resistance.
Strength grade of external hexagon bolt
The strength grades of American bolts usually follow the standards of SAE (Society of Automotive Engineers) or ASTM (American Society for Testing and Materials). Here are some common strength grades:
American grade 2: The lowest grade, usually made of low carbon steel, suitable for general use.
Tensile strength: about 60,000 psi
Yield strength: about 36,000 psi
American grade 5: Medium strength, usually made of medium carbon steel and quenched and tempered.
Tensile strength: about 120,000 psi
Yield strength: about 92,000 psi
American grade 8: High strength, usually made of medium carbon alloy steel and quenched and tempered.
Tensile strength: about 150,000 psi
Yield strength: about 130,000 psi
The strength grades of metric bolts usually follow the standards of ISO (International Organization for Standardization) or DIN (German Institute for Standardization). Common strength grades include:
4.8: Tensile strength: 400 MPa
Yield strength: 320 MPa
8.8: Tensile strength: 800 MPa
Yield strength: 640 MPa
12.9: Tensile strength: 1200 MPa
Yield strength: 1080 MPa
American bolts: Mainly used in the North American market, used in automobiles, mechanical equipment, construction and other fields. Its strength grade identification is usually indicated by numbers and marks on the bolt head.
Metric bolts: Used worldwide, especially in the European and Asian markets, widely used in machinery manufacturing, construction engineering, automobile manufacturing, electronic appliances and other fields. Its strength grade is usually indicated by numbers on the bolt head (such as 8.8, 10.9, 12.9).
Jiangxin main feature: the advantages of external hexagon
1. High strength and reliability
The strength grades of American external external hexagon bolt (such as SAE Grade 5 and Grade 8) have undergone rigorous standardized testing to ensure their reliability under high loads and extreme conditions. High-strength materials and heat treatment processes make them perform well in heavy loads and high-stress environments.
2. Easy to install and remove
The hexagonal head design facilitates installation and removal using a variety of standard wrenches and socket tools, which is easy and quick to operate. This feature is particularly important in applications that require frequent assembly and disassembly.
3. Wide availability
American external external hexagon bolt are very popular in the North American market, and standardized sizes and specifications make them easily available in the market. Their wide availability reduces the complexity of procurement and inventory management.
4. Multiple material and surface treatment options
American external external hexagon bolt can be manufactured with different materials (such as carbon steel, alloy steel and stainless steel), and can be subjected to various surface treatments (such as galvanizing, nickel plating and coating) to meet the needs of different environments and applications.
5. Standardization and interchangeability
American bolts that follow SAE and ASTM standards have a high degree of standardization and interchangeability, ensuring that they can be used interchangeably in different production and application environments, reducing the complexity of design and maintenance.
Application cases in different industrial fields
Mechanical Manufacturing
In mechanical manufacturing, external external hexagon bolt are used to connect various parts, such as machine tools, engines, gearboxes, etc. Their high strength and easy disassembly and assembly make them the preferred fasteners in the machinery industry.
Construction Engineering
In construction projects, external external hexagon bolt are used to connect steel structures, such as fixing steel beams and steel columns. High-strength external external hexagon bolt can withstand huge loads in building structures and ensure the safety and stability of buildings.
Automobile manufacturing
In automobile manufacturing, external external hexagon bolt are widely used to connect engines, chassis, bodies and other parts. Their good mechanical properties and corrosion resistance ensure the reliable operation of automobiles in various complex environments.
Aerospace
In the aerospace field, external external hexagon bolt are used for structural connections of aircraft and spacecraft. Made of high-strength alloy steel or titanium alloy, they can meet stringent weight, strength and corrosion resistance requirements.
