S-97832A329 1/4"-28 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Precise component alignment enabled by the 2" shoulder with tight diameter tolerance for stable assemblies
• High load-bearing capacity with 70,000 psi tensile strength and 35,000 psi minimum shear strength for demanding applications
• Secure, fine-thread engagement through Class 3A UNF 1/4"-28 threads, reducing vibration loosening risks
• Easy installation and removal with hex socket drive and knurled head for enhanced grip during torque application
• Long-term reliability supported by Rockwell B55 hardness, ensuring durability under repeated use
• Regulatory compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for safe, global usage

Professional Applications & Engineering Value

This shoulder screw is engineered to address critical alignment and load distribution challenges in industrial assemblies. The 2" shoulder length provides a precise bearing surface for rotating components like gears, pulleys, and linkages, minimizing misalignment and wear. Manufactured from 18-8 stainless steel, it offers excellent resistance to corrosion and oxidation, making it suitable for applications in machinery, automotive, and electronics where environmental factors are a concern. The fine UNF thread and Class 3A fit ensure secure fastening in high-vibration settings, while the hex socket drive and knurled head facilitate efficient installation in confined spaces. By integrating high tensile strength and compliance with ASME B18.3 standards, this screw delivers consistent performance, reducing maintenance needs and enhancing operational safety in precision engineering projects.

Specification Summary & Compliance

This shoulder screw features a Class 3A thread fit for high-precision applications, with a shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005" to ensure dimensional accuracy. It adheres to ASME B18.3 manufacturing specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious and regulated industries.