S-90969A260 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 140,000 psi tensile strength for reliable performance in high-stress applications
• Superior corrosion resistance provided by the black oxide finish, extending service life in demanding industrial environments
• Precision thread engagement with Class 3A fit ensuring consistent, vibration-resistant fastening in critical assemblies
• Enhanced installation control through the knurled, ultra-low socket head design that prevents tool slippage during torque application
• Optimized shoulder functionality with standardized shoulder fit and tight diameter tolerances for precise component alignment
• Robust material performance from alloy steel with Rockwell C30 hardness, maintaining structural integrity under repeated use
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for global manufacturing requirements

Professional Applications & Engineering Value

This alloy steel shoulder screw delivers critical engineering solutions where precision alignment and high-strength fastening intersect. The 1/4"-20 UNC coarse thread with Class 3A fit provides exceptional resistance to vibrational loosening in machinery, automation systems, and precision equipment. The black oxide finish creates a protective barrier against corrosion while maintaining dimensional stability. The ultra-low socket head with knurled texture ensures positive driver engagement in confined spaces, preventing costly installation errors. With a substantial 1 1/4" shoulder length maintaining tight tolerances, this component excels in pivot points, rotating assemblies, and precision jigs where exact component positioning is paramount to system performance.

Specification Summary & Compliance

This shoulder screw maintains Class 3A thread fit per UNC standards with precise shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005". Manufactured from alloy steel with Rockwell C30 hardness and 140,000 psi tensile strength. The component is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility in industrial applications.