S-95446A160 4-40 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 360 brass construction, ideal for harsh environments and electrical applications
• Exceptional mechanical strength with 40,000 psi tensile strength and Rockwell B55 hardness for reliable, long-lasting fastening
• Precise alignment and smooth rotation ensured by the accurately machined shoulder with tight diameter and length tolerances
• Easy installation and high torque capability with the 5/64" hex socket drive, reducing tool slippage and assembly time
• Wide compatibility and secure fit with Class 2A UNC coarse threads, providing consistent performance in various assemblies
• Compliance with stringent environmental regulations including RoHS 3 and REACH, ensuring safe use in regulated industries
• Optimized for automated and manual assembly with a smooth head texture and standard socket profile

Professional Applications & Engineering Value

This 4-40 UNC brass shoulder screw is engineered to address critical challenges in precision assemblies where alignment, corrosion resistance, and electrical conductivity are paramount. The 360 brass material offers excellent durability against oxidation and galvanic corrosion, making it suitable for marine, electronics, and instrumentation applications. The precise shoulder diameter and length provide a stable bearing surface, preventing component misalignment and reducing wear in rotating mechanisms. With its hex socket drive and Class 2A thread fit, it ensures quick, secure installation in tight spaces, enhancing productivity in automated manufacturing lines. Ideal for use in industrial machinery, pivot points, and electrical enclosures, this shoulder screw delivers reliable performance under moderate loads, backed by its high tensile and shear strength.

Specification Summary & Compliance

This shoulder screw adheres to UNC coarse thread standards with a Class 2A thread fit for consistent engagement and ease of assembly. Key dimensional tolerances include a shoulder diameter of 1/8" (-0.002" to 0") and shoulder length of 1/4" (0" to 0.003"), ensuring precise component fit. Manufactured from 360 brass, it meets RoHS 3 (2015/863/EU) compliance with exemption 6(c) for lead in copper alloy and is REACH (EC 1907/2006) compliant, affirming its suitability for global industrial and electronic applications requiring environmental safety.