8.8 Allen Bolt

20X100 8.8 allen bolt

The quenched and tempered steel Allen bolt grade 8.8 size M20 with a length of 100 mm has an approximate weight of 0.51 kg and is manufactured according to DIN 912 standards. Its alloy composition includes 0.25–0.55% carbon, 0.5–0.8% manganese, small amounts of silicon, and less than 0.035% sulfur and phosphorus. This chemical balance improves tensile strength, enhances hardenability, and reduces brittleness under cyclic or high-stress loading.

The heat treatment process for the M20x100 Allen bolt typically involves quenching in oil or water followed by tempering at controlled temperatures. This sequence produces a martensitic structure with a surface hardness of 22–34 HRC. The tempering stage increases toughness, minimizes the risk of brittle fracture, and provides an optimized balance of hardness, strength, and ductility for industrial use.

Industrial applications of the 8.8 M20x100 Allen bolt include oil and gas facilities, heavy mining equipment, construction machinery, and steel structure assemblies. The longer length allows fastening of thicker components and supports higher axial loads. It is also widely used in machines such as hydraulic presses, industrial cranes, and heavy production lines. Protective coatings like phosphating or galvanization further extend

20X80 8.8 allen bolt

The steel Allen bolt grade 8.8 size M20 with a length of 80 mm has an approximate weight of 0.41 kg and is manufactured according to DIN 912 standards. Its chemical composition contains carbon in the range of 0.25–0.55% and sulfur below 0.035%, ensuring controlled steel quality. The proper carbon content increases tensile strength, while the low sulfur percentage prevents brittleness-related cracking and improves fatigue resistance under cyclic loading.

The M20x80 Allen bolt uses a standard right-hand metric thread with a 60-degree flank angle and a 2.5 mm pitch. This thread type ensures effective engagement and uniform stress distribution along the joint. The effective thread cross-sectional area is about 245 mm², enabling the bolt to withstand axial loads of more than 150 kN, which makes it highly suitable for demanding mechanical applications.

The industrial applications of the 8.8 M20x80 Allen bolt include oil and gas facilities, construction machinery, mining equipment, and heavy steel structures. Its extended length and high strength make it ideal for chassis connections and assemblies subjected to vibration. Additionally, protective coatings such as phosphating or galvanization are often applied to increase wear resistance and prevent corrosion in harsh operating

20X60 8.8 allen bolt

The quenched and tempered steel Allen bolt grade 8.8 size M20 with a length of 60 mm has an approximate weight of 0.31 kg and complies with DIN 912 and ISO 898 standards. Its alloy composition typically includes 0.25–0.55% carbon, 0.5–0.8% manganese, and minor amounts of silicon and phosphorus. This combination enhances mechanical strength and improves heat treatment capability, providing the necessary conditions for high tensile and shear load resistance.

The heat treatment process of the M20x60 Allen bolt involves quenching and tempering, resulting in a surface hardness of 22 to 34 HRC. Quenching forms a martensitic structure, while tempering increases toughness and reduces brittleness. The outcome is a bolt with an optimized balance of hardness and ductility, making it ideal for demanding industrial applications requiring both strength and reliability.

Industrial applications of the 8.8 M20x60 Allen bolt include oil and gas facilities, mining machinery, construction equipment, and heavy steel structures. With a 2.5 mm pitch and an effective thread cross section of 245 mm², it can withstand axial loads exceeding 150 kN. Its high resistance to vibration and cyclic loads, combined with protective coatings such as phosphating or galvanization, extends service life and e

8.8 Allen Bolt

High-strength Allen bolts, known as "dry" Allen bolts, are typically made from high-carbon steel or hardened alloys. Their tensile strength ranges from 800 to 1200 MPa, making them suitable for applications with severe mechanical loads. These bolts usually have diameters between 4 and 20 millimeters and lengths from 10 to 150 millimeters. The bolt head features an internal hexagon Allen design with a 90-degree angle, manufactured according to DIN 912 or ISO 4762 standards. Surface coatings such as chrome or nickel enhance corrosion and wear resistance. Due to their high hardness and mechanical strength, these bolts are widely used in automotive, heavy machinery, and military equipment industries.

The threading of high-strength Allen bolts is typically available in full-thread or half-thread forms, with pitch ranging from 0.7 to 2.5 millimeters based on ISO and DIN standards. Dimensional tolerances are controlled within ±0.1 millimeters, and surface hardness after heat treatment reaches 45 to 55 HRC. These bolts demonstrate significant resistance to high torsional torque and prevent plastic deformation. Thread thickness and depth are precisely engineered to ensure a secure and durable connection. High-strength Allen bolts are an ideal choice for critical applications requiring

16X70 8.8 allen bolt

The steel Allen bolt grade 8.8 size M16 with a length of 70 mm has an approximate weight of 0.16 kg and is manufactured according to DIN 912 and ISO 4762 standards. With a tensile strength of 800 MPa and a yield strength of 640 MPa, it is designed for mechanical joints under heavy loading. The 70 mm length allows deeper thread engagement, increasing connection safety and stability under vibration and variable loads.

The industrial application of the 8.8 M16x70 Allen bolt is common in machinery manufacturing, hydraulic equipment, metal structures, and engine assemblies. With a 2 mm pitch and an effective thread cross section of 157 mm², it can withstand axial loads exceeding 100 kN. Its excellent torsional resistance makes it suitable for steel chassis and heavy machine frames.

In oil and gas industries as well as mining equipment, the 8.8 M16x70 Allen bolt is widely used due to its high strength and surface hardness of 22 to 34 HRC. Surface treatments such as galvanization and phosphating enhance corrosion and wear resistance, increasing the service life of the connection. These properties ensure reliable and safe performance in humid, corrosive, and cyclic load environments.

16X50 8.8 allen bolt

The steel Allen bolt grade 8.8 size M16×50 with a nominal diameter of 16 millimeters and length of 50 millimeters provides an ultimate tensile strength of about 800 MPa and a yield strength of around 640 MPa. Under tensile loading, it can withstand forces close to 100 to 110 kilonewtons, and with a safety factor of 3, it is suitable for industrial applications. The approximate weight of this bolt, considering the density of steel, is between 123 to 127 grams, which directly influences load calculations in mechanical and structural designs.

From a geometrical perspective, the thread pitch of this bolt in metric standard M16 is 2 millimeters, and the effective thread depth is about 1.2 to 1.3 millimeters. These dimensions ensure uniform stress distribution on the contact surface and increase the wear resistance of the connection. The internal hex design of the Allen bolt improves torque precision and allows torque application of 210 to 230 newton-meters. These characteristics make it highly effective for use in steel structures and heavy machinery.

16X60 8.8 allen bolt

The steel Allen bolt grade 8.8 M16 with a length of 60 mm has an approximate weight of 0.14 kg and complies with ISO 4017 and DIN 912 standards. This bolt features a coarse metric thread with a 2 mm pitch, which enhances joint strength under tensile and shear loads. Its tensile strength is rated at 800 MPa, and the yield strength is about 640 MPa, making it suitable for heavy industrial connections. The effective thread cross section is 157 mm², providing an axial load capacity of up to 100 kN.

The thread type of the 8.8 M16 x 60 Allen bolt is right-hand with a 60-degree flank angle, aligned with the metric system. The major diameter is 16 mm, and the minor diameter is approximately 14 mm, ensuring proper thread engagement. The surface hardness of the bolt according to standards ranges between 22 and 34 HRC, and it is commonly supplied with galvanization or phosphate coatings to improve wear resistance and corrosion protection.