S-92991A578 5/16"-18 x 1/2" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to brass construction, ideal for harsh industrial environments
• Exceptional thread precision with Class 3A fit ensures reliable, vibration-resistant fastening
• High durability from Rockwell B55 hardness, providing excellent wear resistance and long service life
• Secure and efficient installation with 5/32" hex drive, allowing for high torque application without slippage
• Optimized for high-vibration applications featuring UNC coarse threads and cup tip for superior grip
• Headless design enables flush mounting in space-constrained assemblies
• Full regulatory compliance with ASME B18.3, RoHS 3, and REACH for global industrial acceptance

Professional Applications & Engineering Value

This brass set screw delivers exceptional engineering value in applications where corrosion resistance and precision are paramount. The combination of UNC coarse threads with Class 3A fit provides superior holding power in high-vibration environments, while the cup tip design creates positive seating on shaft surfaces. The Rockwell B55 hardness ensures the fastener maintains its structural integrity under repeated stress cycles. Particularly valuable in electrical components, marine equipment, and precision machinery, this hex drive set screw offers reliable performance where non-magnetic, corrosion-resistant industrial fasteners are essential for long-term operational safety and reduced maintenance intervals.

Specification Summary & Compliance

This precision set screw features 5/16"-18 UNC coarse threads with Class 3A thread fit for superior dimensional accuracy. Manufactured to ASME B18.3 specifications, it ensures consistent performance across industrial applications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest environmental and safety standards for industrial components.