S-97345A865 5/8"-11 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh industrial environments and chemical exposure
• Exceptional mechanical strength with 70,000 psi tensile strength and 35,000 psi shear strength for reliable, heavy-duty fastening
• Precision thread engagement with Class 3A UNC coarse threads ensuring secure, vibration-resistant connections
• Enhanced grip and tool engagement from the knurled socket head and 3/8" hex drive, preventing slippage during installation
• Accurate component alignment with a 2" shoulder length and controlled diameter tolerance for stable rotational movement
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH for guaranteed quality and environmental safety
• Optimized for high-stress applications with Rockwell B79 hardness providing excellent wear resistance and durability

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery and industrial equipment. The 5/8"-11 UNC coarse thread with Class 3A fit ensures rapid assembly and high clamping force, reducing the risk of thread stripping in high-vibration environments. The 2" shoulder length provides a precise bearing surface for rotating components like gears, pulleys, and linkages, maintaining alignment and reducing wear. The knurled socket head with 3/8" hex drive offers superior torque transmission, minimizing tool cam-out during tight installations. Ideal for automation systems, conveyor equipment, and marine applications, this screw’s corrosion-resistant properties and compliance with ASME B18.3 make it a reliable choice for demanding engineering solutions.

Specification Summary & Compliance

This shoulder screw features a Class 3A thread fit with UNC coarse threads (5/8"-11) and precise shoulder dimensions (2" length with -0.005" to 0.005" tolerance; 3/4" diameter with -0.004" to -0.002" tolerance). Manufactured to ASME B18.3 specifications, it ensures dimensional accuracy and performance consistency. The product is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting stringent environmental and safety regulations for industrial use.