S-97345A634 5/16"-18 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh environments and extending service life.
• High-strength performance offering 70,000 psi tensile and 35,000 psi shear strength for reliable load-bearing in demanding applications.
• Precise assembly and alignment ensured by the standard shoulder fit and Class 3A thread fit, reducing play and improving component stability.
• Secure and easy installation with a hex socket drive and knurled head, providing excellent grip and torque transmission while preventing slippage.
• Durable coarse UNC threads that resist stripping and allow for quicker assembly compared to fine-thread alternatives.
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring quality, safety, and environmental responsibility.
• Versatile right-hand threading compatible with standard components, facilitating straightforward integration into existing systems.

Professional Applications & Engineering Value

This 316 Stainless Steel shoulder screw is engineered to address critical challenges in precision machinery, automation, and assembly lines. The Class 3A thread fit and precisely toleranced shoulder diameter and length ensure minimal backlash and accurate positioning of moving parts, which is vital for reducing wear and maintaining alignment in high-cycle applications. The coarse UNC thread design enables rapid installation and disassembly, boosting productivity in maintenance and production settings. With a hex socket drive and knurled head, it offers superior torque resistance and handling, even in confined spaces or oily conditions. Its high tensile and shear strength makes it suitable for securing gears, pulleys, and linkages, providing long-term reliability in industrial environments where vibration and dynamic loads are common.

Specification Summary & Compliance

This shoulder screw features a 5/16"-18 UNC coarse thread with a Class 3A thread fit for precise engagement, and shoulder dimensions including a diameter of 3/8" (tolerance: -0.004" to -0.002") and length of 13/32" (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 it is free of hazardous substances and suitable for global industrial use.