S-95446A635 4-40 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Durability & Corrosion Resistance - 360 Brass construction with Rockwell B55 hardness provides excellent wear resistance and longevity in demanding environments
• Precise Alignment & Positioning - 1/8" shoulder diameter with tight tolerance ensures accurate component location and reduces assembly vibration
• Superior Mechanical Performance - 40,000 psi tensile strength and 22,000 psi shear strength guarantee reliable performance under heavy loads
• Easy Installation & Maintenance - 5/64" hex socket drive allows for quick assembly and disassembly with standard tools
• Optimized Thread Engagement - Class 2A thread fit with 4-40 UNC coarse threads ensures secure fastening and vibration resistance
• Extended Shoulder Functionality - 1" shoulder length provides ample bearing surface for rotating components and precise pivot points
• Regulatory Compliance Assurance - RoHS 3 and REACH compliant construction meets international environmental and safety standards

Professional Applications & Engineering Value

This precision shoulder screw engineered from 360 Brass addresses critical alignment and wear challenges in industrial machinery. The 1" shoulder length serves as an exact pivot point for rotating components, eliminating bushing requirements and reducing assembly complexity. The 4-40 UNC coarse thread with Class 2A fit ensures reliable fastening in high-vibration environments common to manufacturing equipment and automation systems. The socket head design with 5/64" hex drive facilitates installation in confined spaces while maintaining tool engagement. The combination of Rockwell B55 hardness and brass composition provides optimal wear characteristics for applications requiring repeated adjustment cycles, making it ideal for precision instruments, robotic assemblies, and mechanical linkages where corrosion resistance and dimensional stability are paramount.

Specification Summary & Compliance

This shoulder screw maintains Class 2A thread fit per UNC standards with precise shoulder diameter tolerance of -0.002" to 0" and shoulder length tolerance of 0" to 0.003". Manufactured to meet RoHS 3 (2015/863/EU) compliance with exemption 6(c) for lead in copper alloy and REACH (EC 1907/2006) requirements. The inch system measurement ensures compatibility with North American machinery standards, while the right-hand thread direction and coarse thread spacing provide industry-standard fastening performance for reliable integration into existing industrial systems.