S-92865A164 3/8"-16 x 5 1/4" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Enhanced Load-Bearing Capacity: With a tensile strength of 120,000 psi and Rockwell C25 hardness, this screw reliably handles high-stress applications without deformation.
• Superior Corrosion Resistance: Zinc plating provides a durable protective layer, extending service life in humid or outdoor industrial environments.
• Optimized Thread Engagement: The 3/8"-16 UNC coarse thread design ensures quick, secure fastening and reduces cross-threading risks during assembly.
• High Torque Application Suitability: The external hex head allows for easy installation with standard wrenches, enabling efficient tightening in confined spaces.
• Precision Manufacturing: Class 2A thread fit guarantees consistent dimensional accuracy, promoting reliable performance in repetitive fastening tasks.
• Versatile Partial Threading: The 1" minimum thread length provides flexibility for applications requiring both clamped and unthreaded shank sections.
• Regulatory Compliance Assurance: Meets ASME B18.2.1 and SAE J429 standards, ensuring interoperability and safety in mechanical systems.

Professional Applications & Engineering Value

This Grade 5 hex head screw delivers critical engineering value through its zinc-plated steel construction and UNC coarse thread design. The combination of 120,000 psi tensile strength and Rockwell C25 hardness addresses common failure points in heavy machinery, structural frameworks, and automotive assemblies where vibration and dynamic loads are present. The partial threading allows for precise clamp load distribution, preventing joint loosening while the external hex drive facilitates rapid installation in space-constrained industrial environments. These features collectively solve durability and maintenance challenges in construction equipment, manufacturing fixtures, and transportation systems, reducing downtime and replacement costs.

Specification Summary & Compliance

Manufactured to Class 2A thread fit tolerances with 3/8"-16 UNC coarse threads in a right-hand direction. The screw complies with ASME B18.2.1 and SAE J429 specifications for dimensional and mechanical properties. Environmental and safety adherence includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring suitability for global industrial supply chains.