S-95446A633 4-40 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 360 Brass construction, ideal for harsh environments and electrical applications
• Precise component alignment ensured by the smooth, accurately machined 1/2" shoulder with tight diameter and length tolerances
• High mechanical strength offering 40,000 psi tensile strength and 22,000 psi shear strength for reliable load-bearing performance
• Excellent durability with Rockwell B55 hardness, resisting wear and deformation under repeated use
• Secure and efficient installation using the standard 5/64" hex socket drive, preventing cam-out and ensuring proper torque application
• Wide compatibility with UNC coarse 4-40 threads and Class 2A fit, facilitating easy assembly with standard nuts and tapped holes
• Regulatory compliance meeting RoHS 3 and REACH standards, ensuring safety and environmental responsibility in global markets

Professional Applications & Engineering Value

This 4-40 UNC shoulder screw is engineered to address critical alignment and durability challenges in precision assemblies. The 360 Brass material provides excellent conductivity and corrosion resistance, making it ideal for electrical components, instrumentation, and marine applications. The 1/2" shoulder length with precise tolerances ensures accurate positioning of moving parts like gears and pulleys, reducing wear and maintaining system integrity. With a coarse thread spacing and Class 2A thread fit, it offers quick assembly and reliable fastening in industrial equipment, while the socket head design allows for compact installations in confined spaces. This screw delivers consistent performance in high-stress environments, enhancing the longevity and reliability of your mechanical systems.

Specification Summary & Compliance

This shoulder screw features a 4-40 UNC thread with Class 2A fit for standard compatibility and ease of assembly. The shoulder diameter is 1/8" with a tolerance of -0.002" to 0", and the shoulder length is 1/2" with a tolerance of 0" to 0.003", ensuring precise alignment. It complies with RoHS 3 (2015/863/EU) under exemption 6(c) for lead in copper alloy and REACH (EC 1907/2006) regulations, confirming its adherence to environmental and safety standards for industrial use.