S-97832A359 1/2"-13 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Superior load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
• Precise component alignment enabled by the standard shoulder fit and consistent shoulder diameter tolerance
• Secure, non-slip installation thanks to the knurled head texture and 5/16" hex drive socket
• Reliable thread engagement with Class 3A thread fit and coarse UNC threading for vibration resistance
• Extended service life from Rockwell B55 hardness, ensuring durability under repeated stress
• Regulatory peace of mind with full compliance to ASME B18.3, RoHS 3, and REACH standards

Professional Applications & Engineering Value

This shoulder screw is engineered to solve critical alignment and load distribution challenges in industrial machinery, automation systems, and precision equipment. The 18-8 stainless steel material provides excellent resistance to corrosion and oxidation, making it suitable for washdown environments or outdoor applications. The 1/2"-13 UNC coarse thread with Class 3A fit ensures rapid assembly and maintains integrity under vibration, while the precisely machined shoulder acts as a pivot, bearing surface, or locator for rotating parts like gears, pulleys, and linkages. The knurled head and hex drive socket allow for secure tool engagement, reducing slippage during torque application and improving worker safety in high-production settings.

Specification Summary & Compliance

This shoulder screw features a 1/2"-13 UNC thread with Class 3A fit and a shoulder diameter tolerance of -0.004" to -0.002". It is manufactured in accordance with ASME B18.3 specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring it meets stringent industry and international standards for performance and safety.