S-99894A225 5/16"-18 x 2 1/2" MS90725-42 Mil. Spec. Medium-Strength Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 PSI ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
• Cadmium plating provides superior corrosion resistance, extending the screw's service life in harsh environments and minimizing maintenance needs.
• Grade 5 steel construction with Rockwell C25 hardness offers excellent durability and resistance to wear, ensuring long-term fastening integrity.
• Partially threaded UNC coarse design allows for easier alignment and faster installation, saving time on assembly lines.
• Class 2A thread fit ensures consistent, precise engagement with nuts and tapped holes, enhancing connection reliability.
• External hex drive and hex head enable secure tool grip for high-torque applications, preventing slippage during tightening.
• Compliance with MS90725-42, RoHS, and REACH guarantees adherence to industry standards and environmental regulations, supporting responsible sourcing.

Professional Applications & Engineering Value

This 5/16"-18 UNC hex head screw is engineered to address common industrial challenges, such as vibration-induced loosening and environmental degradation. Made from Grade 5 steel with a cadmium-plated finish, it resists rust and wear in demanding settings like machinery assembly, construction, and automotive systems. The partially threaded design with coarse UNC spacing simplifies installation in coarse-grained materials, reducing assembly time while maintaining a secure hold. Its external hex drive allows for high-torque application, ensuring tight fastening in heavy-duty applications where reliability is critical. Ideal for structural frameworks and equipment that require consistent performance under stress, this screw delivers long-term value by minimizing downtime and replacement costs.

Specification Summary & Compliance

This fastener features precise Class 2A thread fit and adheres to UNC coarse thread standards, ensuring dimensional accuracy for reliable mating components. It meets MS90725-42 specifications for quality and performance, and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental responsibility in industrial use.