S-97832A358 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 environments and reducing long-term replacement costs.
• Superior load-bearing capacity from a high 70,000 psi tensile strength and 35,000 psi shear strength, ensuring reliability in demanding applications.
• Precise alignment and smooth rotation enabled by the 5/8" diameter shoulder with controlled tolerances, minimizing wear on mating parts.
• Secure and efficient installation with a knurled hex socket head that provides excellent grip and resists tool slippage under high torque.
• Reliable thread engagement due to the Class 3A fit and coarse 1/2"-13 UNC thread, offering faster assembly and vibration resistance.
• Guaranteed quality and safety through compliance with ASME B18.3 standards, RoHS 3, and REACH regulations.
• Optimized material durability with a Rockwell B55 hardness, providing a robust balance of strength and ductility.

Professional Applications & Engineering Value

This shoulder screw is engineered to address critical alignment and pivot point challenges in industrial machinery, automation systems, and precision assemblies. The 18-8 Stainless Steel material offers excellent corrosion resistance, making it suitable for environments exposed to moisture or chemicals, thereby extending service life and reducing maintenance. The 5/8" shoulder diameter provides a precise bearing surface that ensures accurate component positioning and smooth rotational movement, preventing misalignment and premature wear. Combined with the coarse UNC thread and Class 3A fit, it delivers secure fastening and vibration resistance, which is crucial for high-stress applications. The knurled hex socket head enhances torque transmission and prevents cam-out, ensuring efficient installation in confined spaces. This design directly solves engineering pain points related to part longevity, assembly accuracy, and operational reliability in demanding sectors.

Specification Summary & Compliance

This shoulder screw features a 1/2"-13 UNC coarse thread with a Class 3A thread fit for precise engagement. The shoulder diameter is 5/8" with a tolerance of -0.004" to -0.002", and the shoulder length is 7/8" with a tolerance of -0.005" to 0.005", ensuring high dimensional accuracy. 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.