Fractional Size Grade 8 Hex Head Cap Screw with Plain Finish
The Fractional Size Grade 8 Hex Head Cap Screw with Plain Finish is a premium high-strength fastener designed for the most demanding mechanical and structural applications. Manufactured from medium carbon alloy steel and heat-treated to meet SAE J429 Grade 8 and ASTM A354 Grade BD specifications, this screw offers an impressive tensile strength of approximately 150,000 PSI, ensuring superior clamping force and resistance to shear, vibration, and fatigue.
The hexagonal head design allows for excellent torque transfer during installation, making it ideal for securing heavy components where reliability is critical. The plain finish provides a clean, uncoated surface that is ideal for controlled environments or where post-installation coatings such as paint, oil, or anti-corrosion plating will be applied. This untreated finish ensures precise torque readings and strong frictional engagement between mating surfaces, making it a preferred option in precision assembly work.
Grade 8 Hex Head Cap Screws are commonly used in automotive manufacturing, heavy machinery, agricultural equipment, and industrial assembly, particularly where high tensile strength and shock resistance are essential. They are typically paired with Grade 8 hex nuts and hardened flat washers to create robust, load-bearing connections capable of withstanding extreme stress and vibration.
These screws are available in Fractional-based fractional diameters from 1/4" through 1-1/2", with UNC and UNF thread options for versatility across multiple applications. Each Grade 8 Hex Head Cap Screw undergoes stringent quality control to ensure dimensional accuracy, consistent strength, and dependable performance.
When strength, precision, and long-term reliability are non-negotiable, the Fractional Size Grade 8 Hex Head Cap Screw with Plain Finish stands out as the professional’s choice for critical fastening in industrial and mechanical engineering environments.