S-90807A138 3/8"-16 Shoulder Screws
Shoulder Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional strength and durability with 140,000 psi tensile strength and Rockwell C32 hardness, ideal for high-stress industrial applications.
- Superior corrosion resistance provided by the black oxide finish, extending service life in harsh environments.
- Precise alignment and smooth rotation thanks to the standard shoulder fit and knurled head for secure handling.
- High thread reliability with Class 3A fit and coarse UNC threads, ensuring secure fastening and easy assembly.
- Easy installation and removal using a standard 3/16" hex drive, reducing tooling time and effort.
- Compliance with environmental standards including RoHS 3 and REACH, making it safe for various industrial uses.
- Versatile right-hand threading for common applications, offering broad compatibility across machinery and equipment.
Professional Applications & Engineering Value
This alloy steel shoulder screw is engineered to address critical challenges in precision machinery, such as maintaining alignment in rotating assemblies and reducing wear on components. The 1-1/2" shoulder length provides a stable bearing surface, minimizing deflection and ensuring accurate positioning in applications like conveyor systems, automotive fixtures, and robotic arms. The black oxide finish not only resists corrosion but also reduces friction, while the Class 3A thread fit and coarse UNC threads deliver reliable performance under dynamic loads. Ideal for industrial settings requiring high tensile strength and durability, this screw supports efficient maintenance and long-term operational integrity.
Specification Summary & Compliance
This shoulder screw adheres to UNC thread standards with a Class 3A thread fit for precise tolerance, and features a shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005" to ensure consistent performance. It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, supporting environmentally responsible industrial applications.
