S-90002A109 5/16"-18 x 1" ASME B18.2.1, SAE J429 High-Strength Steel Hex Head Screws with Material Certification

Key Features & Benefits at a Glance

• Exceptional tensile strength of 150,000 PSI ensures reliable performance in high-stress industrial environments, reducing the risk of fastener failure.
• Superior corrosion resistance from zinc yellow-chromate plating extends service life, even in harsh or outdoor conditions.
• High hardness rating (Rockwell C33) provides excellent wear resistance and durability for repeated use in demanding applications.
• Full UNC coarse threading with Class 2A fit allows for quick, secure installation and easy disassembly, saving time on assembly lines.
• External hex head design offers straightforward tool engagement and high torque capability, minimizing slippage during tightening.
• Compliance with ASME B18.2.1 and SAE J429 standards guarantees consistent quality and interchangeability, supporting project specifications.
• Right-hand thread direction with coarse spacing ensures strong holding power and resistance to vibration loosening in heavy machinery.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this Grade 8 hex head screw addresses critical challenges in construction, machinery, and automotive sectors where high tensile strength and corrosion resistance are paramount. The steel material combined with zinc yellow-chromate plating protects against rust and environmental degradation, reducing maintenance costs and downtime. Its fully threaded UNC coarse spacing and external hex drive facilitate efficient installation in tight spaces, while the Class 2A thread fit ensures precise engagement without cross-threading. Ideal for securing structural components, this fastener delivers long-term reliability under extreme loads, meeting rigorous ASME B18.2.1 and SAE J429 specifications for performance and safety.

Specification Summary & Compliance

This product features a 5/16"-18 UNC coarse thread with Class 2A fit for dimensional accuracy, ensuring consistent thread engagement. It complies with ASME B18.2.1 and SAE J429 standards, confirming adherence to manufacturing and material requirements. The zinc yellow-chromate finish provides corrosion protection, and the fastener meets common industry regulations for quality and performance in industrial settings.