S-90318A102 2-56 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel material and passivated finish, ideal for harsh industrial environments
• Exceptional mechanical strength with 70,000 psi tensile strength and 35,000 psi minimum shear strength for reliable load-bearing performance
• Precise shoulder fit with controlled diameter and length tolerances ensuring accurate alignment in assemblies
• Optimized drive engagement with hex socket head and ultra-low profile for secure installation in confined spaces
• Durable thread performance with UNC coarse threading and Class 2A fit providing vibration resistance and easy assembly
• Consistent hardness at Rockwell B70 maintaining dimensional stability under mechanical stress
• Regulatory compliance meeting RoHS 3 and REACH standards for safe use in regulated industries

Professional Applications & Engineering Value

Engineered for precision motion control and alignment applications, this 316 Stainless Steel shoulder screw delivers critical performance where corrosion resistance and dimensional accuracy are paramount. The UNC coarse threading combined with Class 2A thread fit ensures reliable fastening in vibrating environments while facilitating rapid assembly. The precise shoulder diameter and controlled length tolerances provide exact locating surfaces for bearings, pulleys, and rotating components, eliminating misalignment issues in machinery, automation systems, and precision instruments. The passivated finish enhances surface durability while maintaining the superior corrosion resistance of 316 stainless steel, making these socket head shoulder screws ideal for chemical processing, marine applications, and food processing equipment where environmental resistance is critical.

Specification Summary & Compliance

This precision 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 compliance for industrial applications. The combination of 70,000 psi tensile strength and Rockwell B70 hardness provides consistent mechanical performance across production runs.