S-90600A153 5/16"-18 x 1 3/4" ASME B18.3 Stainless Steel Button Head Torx Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish for extended service life in harsh environments
• Enhanced torque transmission and reduced cam-out through T40 Torx drive design for reliable installation in high-torque applications
• Precise Class 3A thread fit ensures secure fastening with minimal vibration loosening in critical assemblies
• High-strength performance with 60,000 psi tensile strength and Rockwell B55 hardness for demanding industrial applications
• Optimized thread engagement with fully threaded 5/16"-18 UNC coarse thread design for faster installation and superior holding power
• Streamlined rounded head profile provides a low-profile finish while maintaining excellent drive engagement
• Regulatory compliance assurance meeting ASME B18.3 standards and environmental regulations including RoHS 3 and REACH

Professional Applications & Engineering Value

This 18-8 stainless steel rounded head screw delivers exceptional engineering value in demanding industrial environments where corrosion resistance and mechanical reliability are paramount. The combination of T40 Torx drive and Class 3A thread fit addresses common installation challenges by providing superior torque transmission while preventing stripping and cam-out during high-torque applications. The passivated finish enhances the natural corrosion resistance of stainless steel, making these fully threaded screws ideal for machinery, equipment manufacturing, and outdoor applications where exposure to moisture and chemicals is a concern. The 5/16"-18 UNC coarse thread design ensures rapid installation and reliable performance in various materials, while the rounded head profile offers a clean, finished appearance without compromising drive engagement.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 3A thread fit and UNC coarse thread specifications, this fastener ensures consistent performance and interchangeability. The screw complies with ASME B18.3 manufacturing standards and meets environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) requirements. With a tensile strength of 60,000 psi and Rockwell B55 hardness, the mechanical properties are verified to deliver reliable performance in industrial fastening applications.