S-90337A361 2-56 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.
• Enhanced assembly precision with Class 2A thread fit and precise shoulder fit, ensuring accurate alignment and reduced component wear.
• High mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under load.
• Space-saving low-profile socket head with 5/64" hex drive for secure installation in confined spaces without compromising torque application.
• Optimized for rapid assembly featuring coarse UNC threading and right-hand direction for faster installation and disassembly.
• Dimensional stability with tight shoulder diameter and length tolerances, providing consistent performance in precision applications.
• Compliance with global standards including RoHS 3 and REACH, ensuring safety and environmental responsibility for international supply chains.

Professional Applications & Engineering Value

This 2-56 UNC shoulder screw is engineered to address critical alignment and durability challenges in industrial applications. The 18-8 Stainless Steel material provides excellent resistance to corrosion and oxidation, making it suitable for machinery, electronics, and automotive assemblies exposed to moisture or chemicals. The low profile socket head design, combined with a 1 1/2" shoulder length, allows for precise component positioning and rotational control, reducing misalignment and wear in pivoting or guiding mechanisms. With a coarse thread spacing and Class 2A thread fit, it ensures quick, secure fastening in high-vibration environments, enhancing assembly efficiency and long-term reliability for OEMs and maintenance teams.

Specification Summary & Compliance

This shoulder screw adheres to inch system measurements with a 2-56 UNC thread size and Class 2A thread fit for consistent dimensional accuracy. The shoulder features a diameter of 3/32" with a tolerance of -0.001" to 0" and a length of 1 1/2" with a tolerance of 0" to 0.002", ensuring precise fits. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious and regulated industrial markets.