S-92949A580 5/16"-18 x 5/8" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 Stainless Steel construction and passivated finish for long-term reliability in harsh environments
• Superior holding power achieved through Class 3A UNC coarse threads ensuring precise, vibration-resistant connections
• High-strength performance delivering 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
• Easy installation and removal with 3/16" hex drive providing secure tool engagement and reduced slippage
• Optimized load distribution thanks to the rounded button head design that minimizes surface stress
• Full threading coverage along the 5/8" length for maximum grip and adjustment flexibility
• Regulatory compliance assurance meeting ASME B18.3 standards and environmental regulations for global supply chain compatibility

Professional Applications & Engineering Value

These 18-8 Stainless Steel rounded head screws provide critical solutions for industrial applications where corrosion resistance and mechanical reliability are paramount. The passivated finish significantly enhances surface durability against chemical exposure and oxidation, while the Class 3A UNC coarse threads maintain secure fastening under vibration and dynamic loads. The combination of 70,000 psi tensile strength and Rockwell B55 hardness ensures these hex drive screws withstand extreme mechanical stress in machinery assembly, automotive components, and structural frameworks. The button head profile offers a low-profile installation ideal for confined spaces without compromising clamping force, making them essential for precision engineering applications requiring both performance and aesthetic considerations.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 3A thread fit and UNC coarse threading (5/16"-18) ensuring interchangeability and reliable performance. These rounded head screws comply with ASME B18.3 specifications for dimensional accuracy and mechanical properties. Environmental compliance is verified through RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to restricted substance requirements for international industrial applications.