S-97345A823 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 chemical exposure.
• Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance in high-stress applications.
• Precise alignment and smooth rotation enabled by the 1 3/4" shoulder with tight diameter tolerance, reducing wear on mating parts.
• Secure and efficient installation with a 5/16" hex socket drive and knurled head for improved grip and torque application.
• Reliable thread engagement thanks to the coarse 1/2"-13 UNC thread with Class 3A fit, ensuring vibration resistance and easy assembly.
• Long-term durability backed by Rockwell B79 hardness, maintaining structural integrity under repeated loads.
• Full regulatory compliance with ASME B18.3, RoHS 3, and REACH standards, guaranteeing safety and environmental responsibility.

Professional Applications & Engineering Value

This 316 Stainless Steel shoulder screw is engineered to address critical challenges in industrial machinery, automation, and precision equipment. The 1/2"-13 UNC coarse thread and Class 3A thread fit provide excellent vibration resistance and quick assembly, reducing downtime in production lines. The 1 3/4" shoulder length acts as a precise axle or pivot, minimizing misalignment and wear in rotating assemblies like conveyor systems, robotic arms, and motor mounts. Made from corrosion-resistant 316 stainless steel, it withstands aggressive environments, including those with moisture or chemicals, ensuring longevity. The hex socket drive and knurled head enhance installation efficiency, making it a top choice for industrial fasteners requiring high strength and reliability.

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 consistent fit. The threads adhere to UNC standards with a Class 3A fit for superior accuracy. Manufacturing complies with ASME B18.3 specifications, and the product is fully RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, meeting environmental and safety regulations for global industrial use.