S-92183A322 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and reducing replacement frequency
• Precise alignment and reduced wear due to the Class 3A thread fit, ensuring tight tolerances and reliable assembly in high-vibration applications
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness, providing durability under heavy loads
• Enhanced grip and tool engagement from the knurled hex socket head, preventing cam-out and allowing for secure installation
• Versatile shoulder length options (2"-3.99") for precise spacing and pivot points in machinery and assemblies
• Broad industrial compliance with RoHS 3 and REACH regulations, ensuring safety and environmental standards are met
• Reliable shear resistance with a minimum shear strength of 35,000 psi, suitable for dynamic and static load-bearing applications

Professional Applications & Engineering Value

This 1/4"-20 UNC shoulder screw is engineered to address common industrial challenges, such as misalignment and component wear in rotating assemblies. The 18-8 Stainless Steel material offers excellent corrosion resistance, making it ideal for use in humid or chemical-exposed environments like food processing or marine equipment. The Class 3A thread fit and precise shoulder diameter ensure minimal play, reducing vibration-induced loosening and extending the lifespan of machinery. With a hex socket drive and knurled head, it allows for easy installation in tight spaces, while the coarse UNC thread facilitates quick assembly in automation systems, pivots, and linkages. This screw provides reliable performance in applications requiring high tensile and shear strength, from heavy-duty industrial machinery to precision instruments.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 3A fit for precise thread engagement and tolerance. Dimensions include a thread size of 1/4"-20, head diameter of 7/16", and drive size of 5/32". The shoulder diameter tolerance is -0.004" to -0.002", and shoulder length tolerance is -0.002" to 0.002", ensuring consistent performance. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for global industrial use without hazardous substances.