S-97832A266 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.
• Precise component alignment and pivot points ensured by the 3/4" shoulder diameter with tight tolerances, minimizing assembly errors.
• High load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength, providing reliable performance in demanding applications.
• Secure and durable fastening through Class 3A thread fit and coarse UNC threads, offering excellent vibration resistance and easier assembly.
• Easy installation and removal with a knurled socket head and 3/8" hex drive, allowing for high torque application without slippage.
• Long-term reliability supported by Rockwell B55 hardness, ensuring consistent performance under mechanical stress.
• Compliance with global standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental responsibility.

Professional Applications & Engineering Value

This shoulder screw is engineered to address critical challenges in precision machinery, such as misalignment and wear in rotating assemblies. Made from 18-8 stainless steel, it resists corrosion and maintains integrity in moist or chemical-exposed settings, reducing downtime. The 3/4" shoulder diameter with minimal tolerance variations provides a stable bearing surface for gears, pulleys, or linkages, ensuring smooth operation and extended component life. The coarse UNC threads and Class 3A fit enhance grip in high-vibration environments, common in automotive or industrial equipment, while the knurled socket head allows for secure tool engagement during maintenance. Ideal for applications requiring exact positioning and durability, this screw delivers consistent performance in assembly lines, robotics, and heavy-duty fixtures.

Specification Summary & Compliance

This shoulder screw features precise dimensions, including a shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005", ensuring high accuracy for industrial applications. It adheres to ASME B18.3 standards for uniformity and safety, with threads conforming to UNC coarse type and Class 3A fit for superior engagement. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing it is free from hazardous substances and safe for various global markets.