S-90124A342 3/4"-10 x 2 1/4" ASME B18.2.1, SAE J429 Steel Wire-Lockable Hex Head Screws

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with Black-Oxide Steel coating, extending service life in demanding industrial environments.
• Superior tensile strength of 120,000 psi ensures reliable performance under high-stress applications, reducing failure risks.
• Coarse UNC threading (3/4"-10) provides faster installation and better grip in softer materials, improving assembly efficiency.
• Class 2A thread fit guarantees consistent, precise engagement with nuts, minimizing cross-threading and rework.
• Rockwell C25 hardness offers excellent wear resistance, maintaining structural integrity through repeated use.
• Fully threaded design allows for maximum adjustability and uniform load distribution along the entire length.
• External hex drive and 1 1/8" head width enable easy torque application with standard tools, speeding up maintenance and installation.

Professional Applications & Engineering Value

This Grade 5 Hex Head Screw is engineered for heavy-duty industrial applications where reliability and durability are critical. The Black-Oxide Steel material provides a protective layer against rust and corrosion, making it ideal for outdoor machinery, construction equipment, and automotive assemblies exposed to harsh conditions. With its coarse UNC thread and Class 2A fit, it ensures quick, secure fastening in structural joints, reducing assembly time while preventing loosening under vibration. The fully threaded design and high tensile strength support even load distribution, minimizing stress concentrations in critical connections. Commonly used in manufacturing, infrastructure, and transportation sectors, this screw addresses common pain points like fastener fatigue and environmental degradation, delivering long-term performance and compliance with industry standards.

Specification Summary & Compliance

This fastener adheres to ASME B18.2.1 and SAE J429 specifications, ensuring dimensional accuracy and performance reliability. Key specifications include a Class 2A thread fit for consistent engagement, UNC coarse threading (3/4"-10) with precise spacing, and a right-hand thread direction. The wire locking type enhances security in dynamic applications. Manufactured from Black-Oxide Steel, it meets general industry requirements for corrosion resistance and mechanical properties, with no specific RoHS or REACH exemptions noted in the provided data. This product is designed to support industrial safety and efficiency through standardized compliance.