S-99894A435 1/2"-13 x 3" MS90725-119 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 applications, reducing the risk of fastener failure.
• Superior corrosion resistance from cadmium plating extends service life in harsh industrial environments, minimizing maintenance needs.
• Precise Class 2A thread fit guarantees smooth installation and secure fastening, reducing assembly time and improving joint integrity.
• Coarse UNC threading provides excellent grip in softer materials and resists vibration loosening, enhancing long-term stability.
• Partially threaded design allows for controlled clamping force and prevents over-tightening, protecting sensitive components.
• External hex drive and hex head enable easy installation with standard tools, speeding up assembly in confined spaces.
• Rockwell C25 hardness ensures durability against wear and deformation, maintaining fastener integrity through repeated use.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these Grade 5 steel hex head screws address critical challenges in construction, machinery, and equipment assembly. The cadmium-plated finish provides a protective barrier against corrosion, making them ideal for outdoor or humid environments where rust compromises fastener longevity. With 1/2"-13 UNC coarse threads and partially threaded shank, they deliver optimal clamping force without stripping materials, while the external hex drive ensures quick, secure tightening even in hard-to-reach areas. This combination of high tensile strength and precise Class 2A thread fit minimizes downtime by preventing thread galling and ensuring consistent performance under dynamic loads, offering reliable solutions for structural connections and mechanical systems.

Specification Summary & Compliance

This fastener adheres to inch system dimensions with a 3" length, 1/2"-13 UNC coarse thread, and Class 2A thread fit for precise tolerances. It meets MS90725-119 specifications and is manufactured from Grade 5 steel, ensuring compliance with industry standards for strength and reliability. The cadmium plating offers environmental protection, while the design supports consistent performance in demanding applications, aligning with common engineering requirements for industrial fasteners.