S-8077A565 1/2"-13 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh industrial environments and chemical exposure
• Exceptional mechanical strength providing 70,000 psi tensile strength and 35,000 psi shear strength for heavy-duty applications
• Precision thread engagement with Class 3A fit and 1/2"-13 UNC coarse threads ensuring reliable fastening in high-vibration settings
• Enhanced grip and anti-rotation from the knurled head texture, preventing slippage during installation and operation
• Optimized bearing surface with 3/4" shoulder diameter providing stable alignment and reduced wear on connected components
• Durable black oxide finish offering additional corrosion protection and reduced light reflection in sensitive applications
• Simplified maintenance and installation with standard hex drive socket head allowing for easy access in confined spaces

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw delivers critical performance in demanding industrial applications where precision alignment and corrosion resistance are paramount. The combination of Class 3A thread fit and coarse UNC threads ensures rapid assembly and reliable performance in high-vibration environments such as machinery, automotive systems, and precision equipment. The black oxide finish enhances corrosion protection while the knurled head provides positive grip during torque application. The precisely machined shoulder serves as a permanent spacer or pivot point, eliminating the need for additional components in assemblies requiring exact axial positioning. These shoulder screws are engineered to withstand extreme mechanical stresses while maintaining dimensional stability, making them ideal for rotating assemblies, linkages, and precision guiding systems where failure is not an option.

Specification Summary & Compliance

Manufactured to exacting standards with Class 3A thread fit tolerance and precise shoulder dimensions (diameter tolerance: -0.004" to -0.002", length tolerance: -0.005" to 0.005"). Thread specifications conform to 1/2"-13 UNC coarse thread pattern with right-hand orientation. Full compliance with ASME B18.3 specifications for dimensional accuracy and mechanical properties. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for restricted substances, ensuring safe use across global markets.