S-95446A190 4-40 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 360 Brass material, ideal for harsh environments and electrical applications
• Precise component alignment with Class 2A thread fit and controlled shoulder diameter tolerance (-0.002" to 0")
• Exceptional mechanical strength delivering 40,000 psi tensile strength and 22,000 psi shear strength for demanding applications
• Reliable installation torque through hex socket drive design preventing cam-out and ensuring secure fastening
• Optimized pivot and spacer functionality with 3/8" shoulder length maintaining precise component positioning
• Industry compliance assurance meeting RoHS 3 and REACH regulations for global manufacturing requirements
• Enhanced durability with Rockwell B55 hardness providing excellent wear resistance in repetitive assembly operations

Professional Applications & Engineering Value

This 4-40 UNC shoulder screw delivers critical engineering solutions where precision alignment and electrical conductivity are paramount. The 360 Brass construction provides natural corrosion resistance while maintaining excellent machinability for custom applications. The 1/8" shoulder diameter with precise tolerance control ensures perfect bearing surfaces in rotating assemblies, eliminating component wobble and reducing wear. The coarse UNC thread with Class 2A fit facilitates quick assembly in production environments while maintaining vibration resistance. Commonly specified in electrical enclosures, precision instruments, and pivot mechanisms, the combination of socket head design and right-hand threading enables secure installation in confined spaces where reliability is non-negotiable.

Specification Summary & Compliance

Manufactured to exacting standards with Class 2A thread fit per UNC specifications, ensuring consistent engagement and reliable performance. The shoulder features precise dimensional control with diameter tolerance of -0.002" to 0" and length tolerance of 0" to 0.003" for engineering applications requiring exact positioning. Full compliance with RoHS 3 (2015/863/EU) under exemption 6(c) for lead in copper alloys and REACH (EC 1907/2006) regulations, meeting international environmental and safety standards for industrial components.