S-97345A864 1/2"-13 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 extended service life.
• Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance in high-stress applications.
• Precise Class 3A thread fit ensures smooth assembly, reduces galling, and provides consistent clamping force.
• Knurled socket head with 3/8" hex drive for secure tool grip, preventing cam-out and enabling efficient installation.
• Generous 1 1/2" shoulder length provides stable bearing surface for rotating components, minimizing wear and misalignment.
• Compliance with ASME B18.3 standards guarantees dimensional accuracy and interchangeability for engineering consistency.
• RoHS 3 and REACH compliant for safe use in regulated industries, ensuring environmental and health safety standards are met.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery and heavy-duty assemblies. Its 1/2"-13 UNC coarse threads and Class 3A thread fit provide excellent resistance to vibration loosening, making it ideal for dynamic applications like conveyor systems, robotic arms, and automotive jigs. The socket head design with knurled texture ensures reliable torque transmission, reducing the risk of tool slippage during high-torque fastening. The robust shoulder diameter and length act as a precise pivot or spacer, eliminating the need for additional bushings and simplifying assembly in industrial equipment. With high tensile and shear strength, it withstands extreme loads while the 316 stainless steel material offers superior corrosion resistance in chemically aggressive or marine environments, ensuring long-term reliability and reduced maintenance costs.

Specification Summary & Compliance

This shoulder screw features a 1/2"-13 UNC coarse thread with Class 3A thread fit for precise engagement, and a shoulder diameter tolerance of -0.004" to -0.002" with length tolerance of -0.005" to 0.005" ensuring dimensional accuracy. Manufactured in compliance with ASME B18.3 specifications, it meets stringent quality standards for interchangeability. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to environmental and safety regulations for industrial use.