S-94035A133 4-40 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel and passivated finish for long-lasting performance in harsh environments
• Precise component alignment ensured by the 1/8" diameter shoulder with tight tolerances for reduced assembly errors
• High-strength fastening with 70,000 psi tensile strength and Rockwell B55 hardness for demanding industrial applications
• Easy installation and removal using the standard hex socket head with 5/64" drive for secure tool engagement
• Reliable thread engagement with Class 2A UNC coarse threads providing consistent fit and vibration resistance
• Environmental compliance meeting RoHS 3 and REACH regulations for safe use in regulated industries
• Versatile right-hand threading compatible with standard UNC components for broad application compatibility

Professional Applications & Engineering Value

This 4-40 UNC shoulder screw delivers exceptional engineering value in precision assemblies where component alignment is critical. The 18-8 stainless steel construction with passivated finish provides excellent corrosion resistance, making it ideal for industrial equipment, machinery, and electronic enclosures exposed to moisture or chemicals. The precisely machined 1/8" shoulder diameter acts as a reliable locating surface for gears, bearings, and rotating components, eliminating misalignment issues that cause premature wear. With its hex socket head design, installers achieve higher torque values without stripping, while the Class 2A thread fit ensures consistent engagement in UNC coarse thread applications. These features combine to create a precision shoulder screw solution that reduces assembly time, minimizes maintenance, and enhances equipment reliability across manufacturing, automation, and precision engineering sectors.

Specification Summary & Compliance

This shoulder screw maintains Class 2A thread fit per UNC standards with precise shoulder diameter tolerance of -0.001" to 0" and shoulder length tolerance of 0" to 0.002". Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory compliance for industrial fastening applications.