S-97832A263 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.
• Enhanced load-bearing capacity from the 3/4" shoulder diameter, providing precise alignment and increased pivot point stability in assemblies.
• High tensile and shear strength (70,000 psi tensile, 35,000 psi shear) ensures reliable performance under heavy-duty mechanical stresses.
• Precise Class 3A thread fit with 1/2"-13 UNC coarse threads for secure, vibration-resistant fastening and easy installation.
• Secure hex drive and knurled head design allows for firm tool grip and efficient torque application, minimizing slippage during assembly.
• Rockwell B55 hardness offers excellent durability and wear resistance, extending the screw's service life in repetitive motion applications.
• Compliance with ASME B18.3 and environmental standards (RoHS 3, REACH) guarantees quality, safety, and regulatory acceptance for global industrial use.

Professional Applications & Engineering Value

This 18-8 stainless steel shoulder screw is engineered to address common industrial challenges such as misalignment, component wear, and corrosion in demanding applications. The 3/4" shoulder diameter and precise Class 3A thread fit provide accurate positioning and reduced play in machinery, making it ideal for pivot points, rotating assemblies, and precision guides. The coarse UNC threads and knurled socket head facilitate quick installation and high torque handling, while the material's inherent resistance to rust and chemicals ensures longevity in environments like automotive, aerospace, and manufacturing equipment. By combining high tensile strength with strict adherence to ASME B18.3 standards, this screw minimizes downtime and enhances assembly reliability.

Specification Summary & Compliance

This shoulder screw features a 1/2"-13 UNC thread with Class 3A fit for tight tolerances, a shoulder diameter of 3/4" (tolerance: -0.004" to -0.002"), and shoulder length of 3" (tolerance: -0.005" to 0.005"). It meets ASME B18.3 specifications for dimensional accuracy and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe and sustainable use in industrial settings.