S-94035A228 5/16"-18 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 18-8 Stainless Steel construction and passivated finish, ensuring long-term reliability in harsh environments.
• High strength and durability with 70,000 psi tensile strength and Rockwell B55 hardness, built to withstand demanding mechanical loads.
• Precise alignment and smooth rotation enabled by the 1 1/2" shoulder with minimal diameter tolerance, reducing wear on mating components.
• Secure and reliable fastening with Class 2A UNC coarse threads, providing excellent grip and vibration resistance in industrial assemblies.
• Easy installation and removal using the hex socket head design, allowing for high torque application without slippage.
• Compliance with environmental regulations, meeting RoHS 3 and REACH standards for safe and sustainable use in global markets.
• Versatile right-hand thread design compatible with standard UNC components, ensuring broad application across machinery and equipment.

Professional Applications & Engineering Value

This 5/16"-18 UNC shoulder screw is engineered to address critical alignment and load-bearing challenges in industrial applications. The 18-8 Stainless Steel material, combined with a passivated finish, offers exceptional resistance to corrosion and oxidation, making it ideal for use in humid or chemically exposed environments. The 1 1/2" shoulder length and precise 3/8" shoulder diameter provide a stable bearing surface, minimizing misalignment and reducing wear in rotating assemblies such as pulleys, gears, and linkages. With a hex socket head for efficient torque transmission and Class 2A thread fit, this shoulder screw ensures reliable performance in high-stress settings, from automotive systems to heavy machinery, enhancing operational longevity and reducing maintenance costs.

Specification Summary & Compliance

This shoulder screw adheres to UNC coarse thread standards with a Class 2A thread fit for consistent engagement and tolerance. The shoulder features a diameter tolerance of -0.001" to 0" and length tolerance of 0" to 0.002", ensuring precise fit in assembly. Manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, it is free of hazardous substances, supporting safe and environmentally responsible industrial use.