S-97832A264 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 extended service life.
• Exceptional mechanical strength offering 70,000 psi tensile strength and 35,000 psi minimum shear strength for reliable performance in demanding applications.
• Precise alignment and location ensured by the 3/4" shoulder diameter with tight tolerances, reducing component wear and assembly time.
• Secure and efficient installation with a 3/8" hex drive and knurled head, providing excellent grip and torque transmission while minimizing tool slippage.
• Consistent and reliable thread engagement due to the Class 3A thread fit and 1/2"-13 UNC coarse threads, ensuring vibration resistance and easy assembly.
• High durability and hardness with a Rockwell B55 rating, maintaining structural integrity under repeated loads and stresses.
• Compliance with industry standards including ASME B18.3, RoHS, and REACH, guaranteeing quality, safety, and environmental responsibility for global supply chains.

Professional Applications & Engineering Value

This shoulder screw is engineered to address critical alignment and load-bearing challenges in precision industrial applications. The 18-8 Stainless Steel material provides excellent corrosion resistance, making it suitable for machinery, automotive assemblies, and equipment exposed to moisture or chemicals. The 3/4" shoulder diameter with tight tolerances acts as a precise pivot or axle, minimizing misalignment and reducing wear on mating parts. Combined with the Class 3A thread fit and coarse UNC threads, it ensures secure fastening in high-vibration environments, such as rotating machinery and conveyor systems. The knurled head and 3/8" hex drive facilitate quick, tool-friendly installation, enhancing productivity in automated or manual assembly lines while maintaining high tensile strength for long-term reliability.

Specification Summary & Compliance

This shoulder screw features a 1/2"-13 UNC thread with Class 3A fit for precise thread engagement, and a shoulder diameter tolerance of -0.004" to -0.002" for accurate alignment. It is manufactured in compliance with ASME B18.3 specifications, ensuring dimensional consistency and performance. The product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and suitable for use in regulated industries.