S-90311A142 10-24 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
• Reliable vibration resistance through nylon patch locking that maintains secure fastening from -50° to 250°F
• Precise component alignment with knurled head and standard shoulder fit for stable assembly positioning
• High-strength performance delivering 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
• Consistent thread engagement with Class 3A UNC coarse threads ensuring precise fit and reduced cross-threading risk
• Easy installation and removal using standard 1/8" hex drive with socket head design for efficient maintenance
• Regulatory compliance assurance meeting ASME B18.3 specifications and environmental standards (RoHS 3, REACH)

Professional Applications & Engineering Value

Engineered for precision machinery and industrial equipment, these 316 stainless steel shoulder screws provide critical alignment and locking functions where vibration resistance is paramount. The nylon patch locking feature maintains torque integrity across temperature fluctuations from -50° to 250°F, preventing loosening in dynamic applications. The Class 3A thread fit with 10-24 UNC coarse threads ensures rapid assembly while maintaining precision tolerances. The knurled head enhances grip during manual adjustments, while the standardized shoulder diameter provides consistent bearing surfaces for rotating components. Ideal for precision instruments, automation equipment, and manufacturing fixtures where corrosion resistance and vibration damping are essential for operational reliability.

Specification Summary & Compliance

This shoulder screw features Class 3A thread fit with UNC coarse thread standard, manufactured to ASME B18.3 specifications. Critical dimensions include shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005" for precision applications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global markets. Material certification confirms 316 stainless steel composition with Rockwell B79 hardness, delivering consistent performance in demanding industrial environments.