S-97345A899 3/4"-10 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 outdoor applications
• Precise alignment and smooth rotation ensured by the 1-1/2" shoulder with tight diameter and length tolerances for reduced wear
• High-strength performance with 70,000 psi tensile strength and 35,000 psi shear strength, suitable for heavy-duty mechanical assemblies
• Secure installation and easy maintenance via the 1/2" hex drive and knurled head, providing excellent grip and torque application
• Reliable thread engagement with Class 3A fit and coarse UNC thread, minimizing loosening under vibration and dynamic loads
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental responsibility
• Enhanced durability from Rockwell B79 hardness, offering long service life in high-stress applications

Professional Applications & Engineering Value

This 3/4"-10 UNC shoulder screw in 316 Stainless Steel is engineered to address critical challenges in precision machinery, automation systems, and heavy equipment. The 1-1/2" shoulder length provides a stable bearing surface for rotating components like gears and pulleys, reducing misalignment and extending part life. With a Class 3A thread fit and coarse UNC thread, it ensures quick assembly and reliable retention in high-vibration environments, such as conveyor systems and industrial robots. The knurled head and 1/2" hex drive facilitate secure handling during installation, while the material's inherent corrosion resistance makes it suitable for marine, chemical, and food processing applications where moisture and chemicals are present. This fastener delivers consistent performance in demanding settings, from manufacturing fixtures to aerospace assemblies, by combining precision dimensions with robust mechanical properties.

Specification Summary & Compliance

This shoulder screw adheres to ASME B18.3 specifications, with a Class 3A thread fit for precise engagement and a shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005" ensuring accurate alignment. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and material integrity. The UNC coarse thread and right-hand thread direction follow standard industrial practices, supporting reliable performance in various mechanical applications.