S-99894A503 5/8"-11 x 1 3/4" MS90725-163 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.
• Corrosion-resistant cadmium plating provides enhanced durability and longevity in harsh industrial environments.
• Grade 5 steel construction with Rockwell C25 hardness offers superior strength and wear resistance for demanding applications.
• Coarse UNC threads with Class 2A fit enable quick and easy installation while maintaining secure fastening.
• Full threading along the 1 3/4" length allows for maximum grip and adjustability in various material thicknesses.
• External hex drive design facilitates straightforward installation and removal with standard tools, improving assembly efficiency.
• Compliance with MS90725-163, RoHS 3, and REACH standards ensures environmental safety and meets rigorous industry specifications.

Professional Applications & Engineering Value

These 5/8"-11 UNC Grade 5 steel hex head screws are engineered to address critical fastening challenges in heavy-duty industrial settings. The cadmium plating significantly enhances corrosion resistance, making them ideal for outdoor machinery, construction equipment, and automotive assemblies where exposure to moisture and chemicals is common. The coarse thread design and Class 2A thread fit provide excellent engagement in both metal and composite materials, reducing the likelihood of cross-threading and ensuring consistent clamping force. With a high tensile strength of 120,000 psi and full threading, these screws deliver reliable performance in structural applications, such as securing beams, frames, and heavy components, where vibration and dynamic loads are prevalent. Their compliance with MS90725-163 specifications further guarantees they meet the stringent requirements of aerospace, military, and industrial OEMs.

Specification Summary & Compliance

This fastener features a 5/8"-11 UNC coarse thread with Class 2A thread fit for precise dimensional accuracy and ease of assembly. Manufactured from Grade 5 steel and finished with cadmium plating, it complies with MS90725-163 specifications. The product is also verified to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring adherence to environmental and safety regulations.