S-95635A537 1/4"-20 x 1/2" ASME B18.3 Tamper-Resistant Hex-Drive Stainless Steel Button Head Screws

Key Features & Benefits at a Glance

• Enhanced tamper-proof security with specialized 5/32" tamper-resistant hex drive to prevent unauthorized access in sensitive installations
• Superior corrosion resistance through 18-8 stainless steel construction and passivated finish for long-term reliability in harsh environments
• High-load bearing capability with 70,000 psi tensile strength and Rockwell B70 hardness for demanding mechanical applications
• Precision thread engagement featuring Class 3A UNC coarse threads ensuring secure fastening and vibration resistance
• Streamlined installation profile with rounded button head design reducing snag points while maintaining structural integrity
• Full regulatory compliance meeting ASME B18.3 manufacturing standards and international RoHS 3/REACH environmental directives
• Complete threading coverage along the 1/2" length provides maximum grip strength and uniform stress distribution

Professional Applications & Engineering Value

Engineered for security-critical industrial applications, these 18-8 stainless steel tamper-resistant hex screws address two primary engineering challenges: unauthorized access prevention and environmental degradation. The passivated finish creates an additional protective oxide layer that significantly enhances the natural corrosion resistance of stainless steel, making these button head screws ideal for outdoor equipment, marine components, and chemical processing facilities where moisture and corrosive agents are present. The Class 3A thread fit with UNC coarse threading ensures rapid installation while maintaining precise tolerances for vibration-prone assemblies. Particularly valuable in public infrastructure, transportation systems, and secured enclosures, the tamper-resistant drive system deters casual interference while the rounded head profile minimizes injury risks in accessible locations.

Specification Summary & Compliance

This 1/4"-20 x 1/2" tamper-resistant hex button head screw maintains precision Class 3A thread fit according to UNC standards with coarse thread spacing for optimal engagement. Manufacturing specifications strictly adhere to ASME B18.3 dimensional requirements, ensuring interchangeability and reliability. The component is fully compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations regarding chemical safety, verified through current compliance documentation as of June 2023.