S-8077A587 5/16"-18 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, ideal for harsh environments like marine or chemical processing.
- Enhanced durability and reduced galling from the black oxide finish, which also provides a sleek, non-reflective appearance.
- Precise alignment and smooth rotation thanks to the 7 1/2" shoulder with tight diameter tolerance, minimizing wear in pivoting or sliding applications.
- High-strength performance with 70,000 psi tensile and 35,000 psi shear strength, ensuring reliability under heavy loads.
- Secure and easy installation using a standard hex drive and knurled head for improved grip, reducing tool slippage.
- Accurate and reliable threading with Class 3A fit and UNC coarse thread, offering excellent resistance to vibration loosening.
- 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 with a black oxide finish is engineered to address common industrial challenges such as corrosion, misalignment, and mechanical failure. The UNC coarse thread and Class 3A thread fit provide superior holding power in high-vibration environments, making it ideal for machinery, automotive assemblies, and precision equipment. The extended 7 1/2" shoulder length ensures accurate component spacing and reduces friction, while the socket head with hex drive allows for easy installation in confined spaces. With high tensile and shear strength, it supports heavy-duty applications without compromising on durability or compliance with regulations like RoHS and REACH.
Specification Summary & Compliance
This shoulder screw features a 5/16"-18 UNC thread with Class 3A fit for precise tolerance, and a shoulder diameter tolerance of -0.004" to -0.002" for consistent performance. It meets ASME B18.3 specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring it adheres to environmental and safety standards for industrial use.
