S-90311A151 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 extended service life.
• Vibration-resistant locking performance thanks to the integrated nylon patch thread locker, maintaining secure fastening from -50° to 250° F.
• High-strength durability with 70,000 psi tensile strength and Rockwell B79 hardness, ensuring reliable performance under heavy loads.
• Precision alignment and spacing provided by the 2" shoulder length with tight tolerances, reducing wear in pivoting or rotating assemblies.
• Easy installation and removal using the standard hex socket drive (1/8"), combined with the knurled head for improved grip during handling.
• Consistent thread engagement with Class 3A fit and 10-24 UNC coarse thread, offering reliable assembly in various applications.
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory adherence for global supply chains.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and heavy-duty equipment. The 2" shoulder length with minimal tolerances ensures accurate component alignment, reducing misalignment and bearing surface wear in rotating assemblies. The integrated nylon patch thread locker provides reliable vibration resistance, preventing loosening in dynamic environments from -50° to 250° F. With a 10-24 UNC coarse thread and Class 3A fit, it delivers secure fastening in high-stress applications, while the knurled head and hex socket drive facilitate easy installation in confined spaces. Ideal for use in industrial machinery, automotive systems, and electronic enclosures, this fastener combines durability with regulatory compliance to enhance assembly longevity and performance.

Specification Summary & Compliance

This shoulder screw features a Class 3A thread fit for precise engagement, with a shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005". It conforms to ASME B18.3 specifications for dimensional accuracy and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are met for industrial use.