S-92620A340 1 1/2"-6 x 4" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 150,000 psi ensures reliable performance in the most demanding heavy-duty applications, reducing the risk of fastener failure.
• Superior corrosion resistance from the zinc yellow-chromate plating protects against rust and extends service life in harsh industrial environments.
• High hardness rating (Rockwell C33) provides excellent wear resistance and durability, maintaining fastener integrity under high stress.
• Coarse UNC thread design allows for faster installation and better grip in a variety of materials, improving assembly efficiency.
• Precision Class 2A thread fit ensures consistent, reliable engagement with mating parts, minimizing the chance of cross-threading.
• External hex drive and hex head offer secure, high-torque installation with standard tools, simplifying maintenance and assembly.
• Compliance with major standards including ASME B18.2.1, RoHS 3, and REACH guarantees product quality, safety, and environmental responsibility.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to solve critical fastening challenges in heavy machinery, construction, and automotive assemblies. The partially threaded 1 1/2"-6 UNC coarse thread design provides strong holding power in structural applications, while the zinc yellow-chromate plating offers robust protection against corrosion, essential for outdoor or high-moisture environments. Its 150,000 psi tensile strength and Rockwell C33 hardness ensure it withstands extreme loads and vibrations, preventing loosening and failure. Ideal for bolting frameworks, heavy equipment, and industrial fixtures, this screw delivers reliable performance where high-strength fasteners are non-negotiable for safety and longevity.

Specification Summary & Compliance

This screw features a 1 1/2"-6 UNC coarse thread with Class 2A thread fit for precise tolerances, and a length of 4 inches with a minimum thread length of 3 1/4 inches. It meets ASME B18.2.1 specifications under SAE J429, ensuring dimensional accuracy and performance. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to strict environmental and safety standards for industrial use.