S-91385A924 5/8"-11 x 3/4" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating, extending service life in harsh industrial environments.
• High-strength alloy steel construction with Rockwell C28 hardness ensures reliable, long-term fastening under heavy loads.
• Secure vibration-resistant locking via integrated nylon pellet thread locker, maintaining clamp force up to 250°F.
• Precise Class 3A thread fit for smooth assembly and reduced risk of cross-threading in high-volume applications.
• Headless hex drive design allows flush mounting and easy installation in confined spaces with standard tools.
• Cup point tip provides excellent bite and resistance to rotational loosening on shafts and collars.
• Full compliance with ASME B18.3 and ASTM F912 guarantees dimensional accuracy and interchangeability.

Professional Applications & Engineering Value

This 5/8"-11 UNC set screw is engineered to address common industrial challenges like component slippage and vibration-induced failure. The black-oxide alloy steel construction offers enhanced durability and minimal galling, while the coarse thread design ensures quick assembly and disassembly in maintenance-heavy operations. The integrated nylon pellet thread locker secures fasteners without requiring secondary adhesives, ideal for high-temperature applications up to 250°F. Its headless, hex drive configuration is perfect for securing pulleys, gears, and knobs where space is limited and a flush surface is critical. Widely used in machinery, automotive, and heavy equipment assembly, this screw delivers consistent performance under dynamic loads.

Specification Summary & Compliance

This set screw features a 5/8"-11 UNC coarse thread with Class 3A fit for precise tolerance, manufactured in accordance with ASME B18.3 and ASTM F912 specifications. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in global industrial markets.