S-97345A857 5/8"-11 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction for reliable performance in harsh industrial environments
• Precise component alignment through Class 3A thread fit ensuring tight tolerances and reduced vibration
• Enhanced grip and torque application with knurled socket head and 3/8" hex drive for secure installation
• High load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
• Optimized shoulder design providing accurate spacing and rotational control for machinery components
• Industry-standard compliance meeting ASME B18.3 specifications for guaranteed interchangeability
• Environmental responsibility with RoHS 3 and REACH compliance for sustainable manufacturing operations

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw delivers exceptional engineering value in precision machinery applications where corrosion resistance and dimensional stability are critical. The UNC coarse threads with Class 3A fit provide superior engagement in demanding assemblies, while the knurled socket head ensures positive drive engagement during high-torque installations. The precisely machined shoulder maintains accurate component spacing in rotating assemblies, reducing wear and extending equipment life. Ideal for industrial automation systems, conveyor mechanisms, and precision tooling, this fastener solves alignment challenges while withstanding corrosive environments common in chemical processing, marine applications, and food processing equipment. The combination of high tensile strength and corrosion resistance makes it particularly valuable in applications requiring both structural integrity and long-term reliability.

Specification Summary & Compliance

This shoulder screw features precision 5/8"-11 UNC coarse threads with Class 3A fit, ensuring tight dimensional tolerances for reliable assembly. The shoulder maintains tight diameter tolerance (-0.004" to -0.002") and length tolerance (-0.005" to 0.005") for precise component positioning. Manufactured to ASME B18.3 specifications for guaranteed interchangeability, the fastener demonstrates Rockwell B79 hardness and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards for environmental responsibility and workplace safety.