S-96655A129 8-32 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and extended service life.
• Precise component alignment and smooth rotation thanks to the 3/8" diameter shoulder with controlled tolerances, reducing wear on mating parts.
• High-strength performance under load with a tensile strength of 70,000 psi and Rockwell B55 hardness for reliable operation in demanding applications.
• Secure, slip-resistant installation enabled by the knurled head texture and hex socket drive, allowing for high torque application.
• Versatile fastening with partial threading (8-32 UNC), providing a secure thread engagement while the unthreaded shoulder acts as a pivot or spacer.
• Consistent, reliable thread fit with Class 2B thread standards, ensuring compatibility and ease of assembly in production lines.
• Compliance with global environmental standards including RoHS 3 and REACH, making them suitable for regulated industries and export.

Professional Applications & Engineering Value

This 8-32 UNC shoulder screw is engineered to address critical alignment and pivot point requirements in machinery and assemblies. The 18-8 Stainless Steel material offers excellent resistance to rust and corrosion, which is vital in environments exposed to moisture, chemicals, or outdoor elements. The 3/8" shoulder diameter with precise tolerances ensures a snug fit in bores, minimizing play and providing a stable axis for rotating components like gears, levers, and linkages. The partially threaded design allows the unthreaded 2" shoulder length to act as a durable spacer or bearing surface, reducing wear and simplifying assembly in automated equipment, conveyor systems, and precision instruments. The combination of a hex socket drive and knurled head provides a secure grip for tools, preventing cam-out during high-torque installation and maintenance cycles.

Specification Summary & Compliance

This shoulder screw adheres to UNC coarse thread standards with a Class 2B thread fit for consistent assembly. The shoulder diameter tolerance is -0.004" to -0.002", and shoulder length tolerance is -0.005" to 0.005", ensuring high dimensional accuracy. It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming its suitability for use in environmentally conscious and regulated industrial markets.