S-91418A814 5/8"-11 x 5" ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Exceptional Durability & Corrosion Resistance: Black-oxide coated alloy steel construction with Rockwell C45 hardness provides superior strength and long-lasting protection against rust in demanding industrial environments.
• Superior Grip & Secure Fastening: The extended tip design (0.156" length) ensures deeper penetration and a more reliable, vibration-resistant hold on components.
• High-Strength Torque Application: The external square drive and square head allow for high-torque installation with common tools, preventing stripping and ensuring a tight, secure fit.
• Reliable & Predictable Thread Engagement: Coarse UNC threads with a Class 2A fit facilitate easier, faster assembly while maintaining strong holding power and interchangeability.
• Compliance with Rigorous Standards: Manufactured to meet ASTM F912 specifications, ensuring consistent quality, performance, and dimensional accuracy.
• Environmentally Responsible Manufacturing: Compliant with RoHS 3 and REACH regulations, making it suitable for use in regulated industries and global supply chains.
• Optimized for Heavy-Duty Applications: The 5" length and robust material make this set screw ideal for securing large components and machinery under high stress.

Professional Applications & Engineering Value

This 5/8"-11 UNC Square Head Set Screw is engineered to solve critical fastening challenges in heavy machinery, automotive assemblies, and construction equipment. The black-oxide alloy steel construction provides excellent resistance to corrosion and wear, extending service life in harsh conditions. The extended tip design offers enhanced grip by biting deeper into the secured material, effectively resisting loosening from vibration—a common failure point in dynamic industrial applications. Paired with a coarse thread and Class 2A fit, it ensures quick and reliable installation, reducing assembly time while maintaining a secure, high-strength connection. This combination of material properties and mechanical design delivers reliable performance in demanding industrial set screw applications, from securing gears and pulleys to aligning heavy structural components.

Specification Summary & Compliance

This set screw features a 5/8"-11 UNC thread with a Class 2A thread fit, ensuring standard-compliant dimensional accuracy and interchangeability. The extended tip has precise tolerances (Length: -0.005" to 0.005", Diameter: -0.012" to 0"). It is manufactured in compliance with the ASTM F912 standard and is verified to be RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, meeting stringent environmental and safety regulations for industrial use.