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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 exceptional durability and strength.
WEBSITE: 8.8 Allen Bolt Iran