S-90311A185 3/8"-16 ASME B18.3 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
- Superior corrosion resistance with 316 stainless steel construction for reliable performance in harsh environments and extended service life.
- Permanent vibration resistance provided by the nylon patch thread locker, maintaining secure fastening from -50° to 250°F without loosening.
- High-strength reliability with 70,000 psi tensile strength and 35,000 psi minimum shear strength, ensuring durability under heavy loads.
- Precision alignment and smooth rotation from the 1/2" shoulder diameter with tight tolerances, reducing wear on mating components.
- Secure and efficient installation using the hex socket drive and knurled head for improved grip and torque application.
- Accurate and consistent threading with Class 3A UNC coarse threads for easy assembly and reliable fit in industrial applications.
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental responsibility.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and high-stress assemblies. The 1/2" shoulder diameter with controlled tolerances provides exact alignment for rotating parts like bearings and pulleys, minimizing misalignment and reducing component wear. The permanent nylon patch thread locker ensures joint integrity in vibrating environments, preventing costly downtime in industrial equipment and automotive applications. With UNC coarse threads and a hex socket head, installation is swift and secure, enhancing productivity in maintenance and manufacturing processes where reliability is paramount.
Specification Summary & Compliance
This shoulder screw features Class 3A thread fit for precise engagement and a shoulder diameter tolerance of -0.004" to -0.002" for consistent performance. It meets ASME B18.3 specifications for dimensional accuracy and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards in global supply chains.
