S-97832A139 5/16"-18 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction for long-lasting performance in harsh industrial environments
• Precise component alignment with 2" shoulder length maintaining consistent spacing and reducing assembly vibration
• High-strength thread engagement through Class 3A thread fit ensuring reliable fastening in demanding applications
• Enhanced torque application with hex socket drive and knurled head preventing tool slippage during installation
• Exceptional load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for heavy-duty applications
• Standardized compatibility with UNC coarse threads facilitating quick assembly and replacement across industrial equipment
• Regulatory compliance assurance meeting ASME B18.3 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

This stainless steel shoulder screw delivers critical engineering solutions across industrial machinery, automation systems, and precision equipment. The 2" shoulder length provides exact pivot points and bearing surfaces in rotating assemblies, eliminating the need for additional spacers and reducing component count. The 18-8 stainless steel material offers excellent corrosion resistance for applications exposed to moisture, chemicals, or outdoor conditions. With UNC coarse threads and Class 3A thread fit, installation becomes faster while maintaining vibration resistance in high-cycle operations. The combination of hex socket drive and knurled head texture ensures secure tool engagement during torque-critical assemblies, making these shoulder screws ideal for precision manufacturing equipment, conveyor systems, and robotic arms where dimensional stability and reliability are paramount.

Specification Summary & Compliance

Manufactured to exacting standards with Class 3A thread fit for superior engagement and UNC 5/16"-18 coarse thread specification. Shoulder dimensions maintain tight tolerances with diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005". Full compliance with ASME B18.3 manufacturing specifications, RoHS 3 (2015/863/EU) environmental directive, and REACH (EC 1907/2006) regulations for hazardous substances. Mechanical properties include Rockwell B55 hardness and verified 70,000 psi tensile strength for consistent performance in industrial applications.