S-97832A368 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.
• High-strength performance offering 70,000 psi tensile strength and 35,000 psi minimum shear strength for demanding mechanical applications.
• Precise Class 3A thread fit ensures reliable engagement and vibration resistance in assemblies requiring high accuracy.
• Enhanced torque transmission via the 5/16" hex drive and knurled socket head, providing a secure grip and reducing tool slippage.
• Accurate component alignment with a standardized shoulder diameter and length, facilitating precise positioning in machinery and pivots.
• Broad regulatory compliance with ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental standards are met for global supply chains.
• Durable material hardness of Rockwell B55 maintains thread integrity and wear resistance under repeated use.

Professional Applications & Engineering Value

This 3/8"-16 UNC shoulder screw is engineered to address critical challenges in industrial applications such as precision machinery, automation systems, and rotating assemblies. The 18-8 Stainless Steel material provides excellent resistance to rust and corrosion, reducing maintenance needs in humid or chemically exposed settings. The coarse UNC thread and Class 3A fit deliver secure fastening with minimal risk of loosening under vibration, while the knurled socket head and 5/16" hex drive enable efficient installation with standard tools, enhancing assembly speed and reliability. The integrated shoulder acts as a precise axle or pivot, ensuring accurate alignment of components like gears and bearings, which minimizes wear and optimizes operational lifespan in high-stress environments.

Specification Summary & Compliance

This shoulder screw adheres to ASME B18.3 specifications, with a Class 3A thread fit for superior dimensional accuracy. Key tolerances include a shoulder diameter of 5/8" (tolerance: -0.004" to -0.002") and shoulder length of 1/4" (tolerance: -0.005" to 0.005"). The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets environmental and safety standards for industrial use.