S-94328A962 5/16"-18 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional strength and durability with alloy steel construction and Rockwell C30 hardness, ensuring reliable performance under high-stress conditions
• Superior corrosion resistance from the black oxide finish, extending service life in harsh industrial environments
• Precise alignment and reduced wear thanks to the 3/8" shoulder diameter with tight tolerances, minimizing component movement
• Secure installation and removal with the knurled low-profile socket head, providing excellent grip and torque transmission
• High load-bearing capacity with 140,000 psi tensile strength, suitable for demanding mechanical applications
• Reliable thread engagement through Class 3A thread fit and UNC coarse threads, ensuring vibration resistance and easy assembly
• Compliance with environmental standards including RoHS 3 and REACH, making it safe for regulated industrial use

Professional Applications & Engineering Value

This 5/16"-18 UNC shoulder screw is engineered to address critical alignment and durability challenges in industrial machinery. The alloy steel construction combined with black oxide finish provides robust corrosion resistance, essential for components exposed to moisture or chemicals. The 3/8" shoulder diameter with precise tolerances ensures accurate positioning of moving parts, reducing wear and preventing misalignment in assemblies like pivots, gears, and linkages. With a Class 3A thread fit and coarse UNC threads, it offers secure fastening in high-vibration environments, such as automotive systems or manufacturing equipment. The low-profile socket head with knurling allows for efficient installation in confined spaces, enhancing maintenance efficiency. Ideal for applications requiring repeated adjustments, this screw delivers long-term reliability and performance consistency.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 3A thread fit for precise dimensional accuracy. Key specifications include a shoulder diameter of 3/8" with tolerances from -0.004" to -0.002", and shoulder length of 3/8" with tolerances of -0.005" to 0.005". It meets industry manufacturing standards for hardness (Rockwell C30) and tensile strength (140,000 psi). The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for global industrial markets.