Fractional Size Grade 8 Fastener
Fractional Size Grade 8 Hex Head Cap Screws: Maximum Strength and Durability for High-Stress Applications
The Fractional Size Grade 8 Hex Head Cap Screw represents the highest level of strength and performance in the standard carbon steel bolt family. Designed for high-stress and heavy-load applications, these premium fasteners deliver exceptional tensile strength, wear resistance, and long-term reliability in demanding industrial environments.
Manufactured from medium carbon alloy steel and heat-treated for maximum hardness, Grade 8 hex head cap screws feature a minimum tensile strength of 150,000 psi and a yield strength of 130,000 psi. This enhanced strength rating makes them ideal for critical assemblies such as automotive suspensions, heavy equipment, agricultural machinery, and structural connections where failure is not an option.
These screws are available in fractional (Fractional) sizes and conform to ASME B18.2.1 dimensional standards and SAE J429 mechanical property specifications. The hexagonal head design allows for precise torque application and easy wrenching, ensuring a tight, reliable fit even under extreme loads and vibration.
Grade 8 cap screws typically feature a zinc or phosphate coating for corrosion resistance and identification by their six radial lines on the head. Their fine-threaded versions provide even greater clamping force for precision-critical applications.
Key Features:
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Manufactured from heat-treated medium carbon alloy steel
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Minimum tensile strength: 150,000 psi / Yield strength: 130,000 psi
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Designed for high-stress, heavy-duty applications
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Available in fractional (Fractional) sizes per ASME and SAE standards
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Zinc or phosphate finishes for corrosion protection
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Hex head design for superior torque control and reliability
For applications that demand uncompromising strength, toughness, and precision, the Fractional Size Grade 8 Hex Head Cap Screw delivers the durability and performance trusted by engineers, mechanics, and manufacturers worldwide.