S-95635A573 5/16"-18 x 1 1/4" Tamper-Resistant Hex-Drive Stainless Steel Button Head Screws

Key Features & Benefits at a Glance

• Enhanced security with tamper-resistant hex drive design to prevent unauthorized access in sensitive applications
• Superior corrosion resistance through 18-8 stainless steel construction and passivated finish for extended service life in harsh environments
• Reliable thread engagement with Class 3A thread fit ensuring precise, vibration-resistant connections in industrial assemblies
• Optimized strength-to-weight ratio featuring 70,000 psi tensile strength and Rockwell B70 hardness for demanding mechanical applications
• Secure rounded head profile providing smooth finished appearance while maintaining tamper-resistant functionality
• Versatile partial threading allowing for both secure fastening and adjustable positioning in assembly operations
• Environmental compliance meeting RoHS 3 and REACH standards for use in regulated industries worldwide

Professional Applications & Engineering Value

Engineered for industrial security applications, these 5/16"-18 UNC tamper-resistant hex screws address critical needs in access control systems, public infrastructure, and machinery protection. The 18-8 stainless steel construction with passivated finish provides exceptional resistance to corrosion and chemical exposure, making them ideal for outdoor installations, marine environments, and chemical processing facilities. The Class 3A thread fit ensures precise mating with corresponding nuts and threaded components, reducing the risk of vibration-induced loosening in dynamic applications. With their tamper-resistant hex drive and rounded head design, these screws offer both security and aesthetic appeal while maintaining the mechanical integrity required for heavy-duty fastening applications across multiple industrial sectors.

Specification Summary & Compliance

This security fastener features UNC coarse thread spacing with Class 3A thread fit precision, providing superior thread engagement and dimensional accuracy. The screw meets stringent manufacturing standards with 1 1/4" length and partial threading configuration. Compliance is verified with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in electronic equipment, industrial machinery, and consumer products across global markets. The combination of 70000 psi tensile strength and Rockwell B70 hardness guarantees reliable performance in demanding mechanical applications.