S-92311A396 5/8"-18 x 5/8" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and extended service life.
• Exceptional holding power ensured by Class 3A thread fit, providing a tighter, more reliable fastening for critical assemblies.
• High-strength performance with Rockwell B80 hardness, offering excellent resistance to wear and deformation under load.
• Secure, flush installation thanks to the headless design and 5/16" hex drive, preventing snagging and allowing for a clean finish.
• Precise, fine thread engagement with 5/8"-18 UNF right-hand threads, enabling accurate adjustment and vibration resistance.
• Effective point contact from the cup tip, which bites into the shaft for a firm, non-slip grip.
• Full regulatory compliance with ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental standards are met.

Professional Applications & Engineering Value

This hex headless set screw is engineered to address common industrial challenges such as component slippage and corrosion-induced failure. Manufactured from 18-8 stainless steel, it provides outstanding resistance to rust and chemical exposure, making it suitable for applications in machinery, automotive, and marine environments. The Class 3A thread fit and fine UNF thread design ensure minimal backlash and superior vibration resistance, crucial for maintaining alignment in rotating assemblies like pulleys, gears, and couplings. The cup tip creates a concentrated point of contact, digging into the shaft material to prevent rotational movement, while the headless profile allows for seamless integration in confined spaces. This combination of material durability and precision threading delivers long-term reliability, reducing maintenance needs and downtime in heavy-duty set screw applications.

Specification Summary & Compliance

This set screw adheres to ASME B18.3 specifications, with a Class 3A thread fit for high-precision applications. It features a 5/8"-18 UNF fine thread with right-hand direction and a diameter of 0.625". The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets strict environmental and safety standards for industrial use.