S-90337A513 3/8"-16 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction and passivated finish, ensuring long-term reliability in harsh environments.
• Precise alignment and reduced wear due to the 1/2" shoulder diameter with tight tolerance, providing stable pivot points and bearing surfaces.
• High-strength performance offering 70,000 psi tensile strength and Rockwell B55 hardness for demanding mechanical applications.
• Easy installation and removal with a low-profile hex socket head and 1/4" drive, allowing efficient torque application in confined spaces.
• Reliable thread engagement through UNC coarse threading and Class 2A fit, minimizing cross-threading risks and ensuring secure fastening.
• Durable surface protection from the passivated finish, enhancing resistance to oxidation and extending service life.
• Compliance with global standards including RoHS 3 and REACH, making it suitable for regulated industries and international supply chains.

Professional Applications & Engineering Value

This 18-8 stainless steel shoulder screw is engineered to address critical alignment and durability challenges in precision machinery. The 1/2" shoulder diameter with precise tolerances ensures accurate positioning in assemblies, reducing vibration and component wear. Its UNC coarse threads and Class 2A fit provide quick, secure fastening, ideal for high-stress environments like rotating shafts, linkages, and bearing supports. The passivated finish enhances corrosion resistance, while the hex socket head allows for easy access in tight spaces. Commonly used in industrial equipment, automotive systems, and automation technology, this fastener delivers reliable performance where precision shoulder screws are essential for maintaining operational integrity and reducing maintenance costs.

Specification Summary & Compliance

This shoulder screw adheres to inch system measurements with a 3/8"-16 UNC thread and Class 2A thread fit for consistent dimensional accuracy. The shoulder features a diameter of 1/2" with a tolerance of -0.001" to 0" and length of 1" with 0" to 0.002" tolerance, ensuring precise assembly. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious and regulated applications.