S-97832A356 1/2"-13 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments and reducing maintenance costs.
• High-strength performance offering 70,000 psi tensile strength and 35,000 psi minimum shear strength for reliable, heavy-duty applications.
• Precise Class 3A thread fit ensures secure, vibration-resistant assemblies and reduces the risk of loosening under load.
• Knurled hex socket head provides enhanced grip and easier installation with standard 5/16" drive tools, minimizing slippage.
• Accurate shoulder dimensions with tight tolerances for consistent alignment and smooth rotational movement in machinery.
• Compliance with ASME B18.3 standards guarantees dimensional consistency and interchangeability in professional settings.
• Environmentally compliant with RoHS 3 and REACH regulations, supporting sustainable and safe manufacturing practices.

Professional Applications & Engineering Value

This shoulder screw is engineered to address common industrial challenges, such as misalignment and wear in rotating assemblies. The 18-8 Stainless Steel material provides excellent corrosion resistance, extending service life in moist or chemical-exposed environments. Its 1/2"-13 UNC coarse threads with Class 3A fit ensure quick assembly and high clamping force, reducing installation time while maintaining joint integrity. The precisely machined shoulder (5/8" diameter, 1/4" length) acts as a reliable pivot or spacer, minimizing friction and supporting smooth operation in machinery like conveyors, automotive fixtures, and robotic arms. By integrating a knurled hex socket head, it enhances torque transmission and prevents tool slip, making it a dependable choice for heavy-duty fastening in manufacturing and engineering applications.

Specification Summary & Compliance

This shoulder screw adheres to ASME B18.3 specifications, ensuring dimensional accuracy for the 1/2"-13 UNC thread with Class 3A fit and shoulder tolerances (diameter: -0.004" to -0.002"; length: -0.005" to 0.005"). It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, supporting environmental and safety standards in industrial use.