S-97345A650 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 extended service life.
• High-strength performance offering 70,000 psi tensile strength and 35,000 psi shear strength for reliable load-bearing in demanding applications.
• Precise Class 3A thread fit ensures secure, vibration-resistant fastening with minimal backlash.
• Easy installation and removal facilitated by the hex socket drive and knurled head for improved grip.
• Accurate shoulder positioning with a 1/2" diameter shoulder, providing stable alignment for rotating components.
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring quality and environmental safety.
• Durable coarse UNC threads that resist stripping and allow for quick assembly in various materials.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery, such as misalignment and component wear. The 5/16"-18 UNC coarse thread with a Class 3A fit provides exceptional holding power, reducing the risk of loosening under dynamic loads. Its knurled socket head and hex drive enable easy torque application, even in confined spaces, while the 1/2" shoulder diameter offers a stable bearing surface for pivots, gears, and linkages. Ideal for industrial applications like automation systems and conveyor equipment, it combines high tensile strength and corrosion resistance to minimize maintenance and downtime in aggressive operational environments.

Specification Summary & Compliance

This shoulder screw features a 5/16"-18 UNC thread with Class 3A precision tolerance and a shoulder diameter tolerance of -0.004" to -0.002" for consistent performance. It meets ASME B18.3 specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards.