S-97832A373 3/8"-16 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 and 35,000 psi shear strength for reliable performance in high-stress applications.
• Precision alignment and bearing surface provided by the 5/8" diameter shoulder with tight tolerances, minimizing part wear and misalignment.
• Secure and slip-resistant installation enabled by the knurled socket head and hex drive, ensuring firm tool grip during assembly.
• High-accuracy Class 3A thread fit for secure fastening and vibration resistance in demanding mechanical assemblies.
• Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, ensuring quality and environmental safety for global supply chains.
• Optimized for durability with a Rockwell B55 hardness, providing excellent resistance to deformation under load.

Professional Applications & Engineering Value

This 3/8"-16 UNC shoulder screw is engineered to address critical alignment and pivot point requirements in precision machinery. The 5/8" shoulder diameter acts as a precise locating dowel or bearing surface, eliminating the need for additional bushings and reducing assembly complexity in applications like rotating shafts, linkages, and jigs. Manufactured from 18-8 Stainless Steel, it provides excellent corrosion resistance, making it suitable for food processing, chemical, and marine equipment. The coarse UNC thread and Class 3A fit ensure rapid assembly and high vibration resistance, while the knurled socket head with a hex drive prevents cam-out during high-torque installation. This combination of high tensile strength and precise shoulder tolerances delivers reliable performance in automated systems and heavy-duty industrial applications, reducing maintenance downtime and improving operational safety.

Specification Summary & Compliance

This shoulder screw features a 3/8"-16 UNC thread with a Class 3A fit for high precision. The shoulder diameter is 5/8" with a tolerance of -0.004" to -0.002", and the shoulder length is 1" with a tolerance of -0.005" to 0.005". It is manufactured in compliance with ASME B18.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring it is free of hazardous substances and suitable for regulated industries.