S-97345A556 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
• Precise component alignment ensured by the 1-1/4" shoulder length with tight tolerances, reducing assembly errors and improving machine reliability
• High-strength performance delivering 70,000 psi tensile strength and 35,000 psi shear strength for demanding mechanical applications
• Secure, vibration-resistant fastening with Class 3A thread fit and UNC coarse threads, maintaining integrity under dynamic loads
• Easy installation and removal using the hex socket drive and knurled head, allowing for efficient maintenance with standard tools
• Long-term durability supported by Rockwell B79 hardness, resisting wear and deformation in continuous operation
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory acceptance

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in precision assemblies, such as misalignment and component slippage. The 1-1/4" shoulder length provides a stable bearing surface for rotating parts like gears and pulleys, while the Class 3A thread fit and UNC coarse threads offer reliable fastening in high-vibration environments, from automotive systems to industrial machinery. The hex socket drive and knurled head enhance grip during installation, reducing tool slip and improving workflow efficiency. With excellent corrosion resistance and mechanical properties, it is ideal for applications in marine, chemical processing, and food equipment where durability and compliance are paramount.

Specification Summary & Compliance

This shoulder screw features a 10-24 UNC thread size with Class 3A thread fit for precise engagement, and a shoulder diameter of 1/4" with tolerances from -0.004" to -0.002". The shoulder length is 1-1/4" with a tolerance of -0.005" to 0.005", ensuring consistent performance. It meets ASME B18.3 specifications for dimensional accuracy and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible manufacturing.