S-97345A726 3/8"-16 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 strength and 35,000 psi minimum shear strength for reliable, heavy-duty load-bearing applications.
• Precise alignment and smooth rotation enabled by the 2 3/4" shoulder with tight diameter and length tolerances, reducing wear on mating parts.
• Secure, high-precision threading with Class 3A UNC coarse threads for easy engagement and robust fastening in high-vibration settings.
• Easy installation and removal using a standard 1/4" hex drive and knurled head for improved grip and torque application.
• Compliance with industry standards including ASME B18.3, ensuring dimensional accuracy and interchangeability in professional assemblies.
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting global regulatory requirements for hazardous substances.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in demanding industrial applications, such as machinery assembly, automation systems, and precision tooling. The UNC coarse threads and Class 3A thread fit provide reliable fastening in high-vibration environments, minimizing loosening and maintenance downtime. The extended 2 3/4" shoulder length ensures accurate alignment of rotating components like gears and pulleys, reducing friction and premature wear. With a knurled head and hex drive, installation is secure and efficient, even in confined spaces. Its corrosion-resistant properties make it suitable for marine, chemical processing, and food-grade equipment, delivering long-term performance and reducing replacement costs.

Specification Summary & Compliance

This shoulder screw features a 3/8"-16 UNC thread with Class 3A fit for precise engagement, a shoulder diameter of 1/2" (tolerance: -0.004" to -0.002"), and shoulder length of 2 3/4" (tolerance: -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 safety and reliability in global industrial supply chains.