S-90337A484 5/16"-18 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance thanks to 18-8 Stainless Steel construction and a passivated finish, ensuring long-term reliability in harsh environments.
• Precise alignment and smooth rotation for components like gears and pulleys, enabled by the accurately machined shoulder with a tight diameter tolerance of -0.001" to 0".
• High-strength performance with a tensile strength of 70,000 psi and Rockwell B55 hardness, providing durability for heavy-duty industrial applications.
• Secure and reliable fastening with a Class 2A thread fit on the 5/16"-18 UNC coarse thread, ensuring consistent engagement and reducing the risk of cross-threading.
• Space-saving and low-profile design featuring a smooth, low socket head that allows for use in confined spaces while providing ample drive torque with a 5/32" hex drive.
• Compliance with major environmental regulations including RoHS 3 and REACH, making it a safe and responsible choice for global supply chains.
• Optimized for automated assembly with a right-hand thread and consistent shoulder length tolerance (0" to 0.002"), facilitating efficient high-volume production.

Professional Applications & Engineering Value

This precision shoulder screw is engineered to address critical alignment and wear issues in demanding assemblies. Manufactured from 18-8 Stainless Steel and featuring a passivated finish, it resists corrosion and chemical exposure, extending service life in industries like automation, automotive, and machinery. The precise shoulder with minimal diameter tolerance acts as a reliable pivot or axle, reducing friction and maintaining concentricity in rotating parts such as linkages and bearings. The UNC coarse thread and Class 2A fit ensure quick installation and vibration resistance, while the low-profile socket head allows for compact designs without compromising on torque application. Ideal for jigs, fixtures, and precision equipment, this screw delivers consistent performance where dimensional accuracy and material integrity are paramount.

Specification Summary & Compliance

This shoulder screw adheres to Class 2A thread fit and UNC thread standards, ensuring dimensional accuracy and interchangeability. The shoulder features precise tolerances (diameter: -0.001" to 0"; length: 0" to 0.002") for reliable performance. It is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious and regulated industries.