S-91273A204 3/8"-16 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Durability and Corrosion Resistance: Made from 18-8 stainless steel with Rockwell B55 hardness for long-lasting performance in harsh industrial environments.
• Superior Tensile and Shear Strength: Withstands up to 70,000 psi tensile and 35,000 psi shear strength, ensuring reliable load-bearing in heavy-duty applications.
• Precision Thread Fit: Class 2A UNC coarse threads provide consistent, secure fastening with reduced risk of cross-threading.
• Improved Grip and Anti-Slip Handling: Knurled socket head design allows for better torque application and reduces tool slippage during installation.
• Accurate Shoulder Dimensions: Tight tolerances on shoulder diameter and length ensure precise alignment and smooth rotation in assemblies.
• Environmental Compliance: Meets RoHS 3 and REACH standards, making it safe for use in regulated industries and eco-conscious projects.
• Versatile Drive Compatibility: Hex drive style with 3/16" size enables easy integration with standard tools for efficient maintenance.

Professional Applications & Engineering Value

This 18-8 stainless steel shoulder screw is engineered to address common industrial challenges such as misalignment, vibration loosening, and corrosion. The 3/8"-16 UNC coarse thread and Class 2A fit ensure quick, secure fastening in high-stress environments like machinery, automotive assemblies, and precision equipment. The knurled socket head enhances grip, reducing installation errors and improving operator safety. With a 5/8" shoulder length and tight diameter tolerances, it provides stable pivoting and spacing, minimizing wear and extending component life. Ideal for applications requiring high tensile strength and environmental compliance, this screw delivers consistent performance in robotics, conveyor systems, and manufacturing jigs.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for precise dimensional accuracy. Key specifications include a thread diameter of 0.375", thread length of 1/2", shoulder diameter of 3/8" (tolerance: -0.004" to -0.002"), and shoulder length of 5/8" (tolerance: -0.005" to 0.005"). It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety requirements for industrial use.