S-90002A107 1/4"-20 x 2" ASME B18.2.1, SAE J429 High-Strength Steel Hex Head Screws with Material Certification

Key Features & Benefits at a Glance

• Exceptional Tensile Strength – With a 150,000 PSI tensile rating, this screw withstands extreme loads and stresses, reducing the risk of failure in demanding applications.
• Superior Corrosion Resistance – The zinc yellow-chromate plating provides a durable barrier against rust and environmental degradation, extending service life in harsh conditions.
• High Hardness for Durability – Rockwell C33 hardness ensures the screw maintains its shape and thread integrity under high torque and repetitive use.
• Reliable Coarse Thread Design – UNC coarse threads offer quick assembly and better resistance to vibration loosening, ideal for heavy machinery and structural fastening.
• Full Thread Engagement – Fully threaded design allows for consistent clamping force along the entire length, enhancing joint stability.
• Precision Thread Fit – Class 2A thread fit ensures smooth installation with standard nuts and tapped holes, minimizing assembly time and errors.
• Heavy-Duty Material Construction – Made from high-strength steel, this fastener delivers Grade 8 performance for critical industrial and engineering applications.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this Grade 8 hex head screw addresses common challenges in machinery assembly, construction, and automotive sectors. The steel material and Rockwell C33 hardness provide resilience against shear and tensile forces, while the zinc yellow-chromate plating combats corrosion in outdoor or humid environments. Its UNC coarse thread and external hex drive facilitate quick, secure fastening with standard tools, reducing installation time. Fully threaded for uniform load distribution, it is ideal for high-strength bolting where vibration resistance and long-term reliability are paramount, ensuring minimal maintenance and downtime.

Specification Summary & Compliance

This screw adheres to precise Class 2A thread fit and UNC coarse thread standards, ensuring compatibility and performance. It meets ASME B18.2.1 and SAE J429 specifications, confirming its suitability for industrial use. Manufactured in the inch system with dimensions including a 1/4"-20 thread size and 2" length, it complies with industry norms for quality and safety in heavy-duty fastening applications.