S-8077A571 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 and Black Oxide finish, ideal for harsh industrial environments.
- High tensile strength of 70,000 psi ensures reliable load-bearing capacity and long-term durability in demanding applications.
- Precision Class 3A thread fit provides secure fastening with minimal play, reducing vibration loosening.
- Knurled socket head design offers enhanced grip for easy installation and removal with standard hex tools.
- 3" shoulder length with tight tolerances enables accurate alignment and smooth rotation in assemblies.
- Compliance with ASME B18.3, RoHS, and REACH guarantees quality, safety, and environmental standards.
- Coarse UNC threads allow for quick assembly and disassembly, improving maintenance efficiency.
Professional Applications & Engineering Value
This 316 Stainless Steel shoulder screw with a Black Oxide finish is engineered to address common industrial challenges such as misalignment, corrosion, and mechanical failure. The 5/16"-18 UNC thread and Class 3A fit ensure precise engagement in machinery, automotive, and aerospace components, reducing wear and downtime. The 3" shoulder provides a stable pivot or spacer, ideal for rotating parts like bearings and linkages. Its high tensile and shear strength supports heavy-duty applications, while the knurled socket head facilitates secure tool engagement in confined spaces. By combining durability with regulatory compliance, this fastener delivers reliable performance in corrosive or high-stress environments.
Specification Summary & Compliance
This shoulder screw features a 5/16"-18 UNC coarse thread with Class 3A fit for tight tolerances, a shoulder diameter of 3/8" with tolerance of -0.004" to -0.002", and shoulder length of 3" with tolerance of -0.005" to 0.005". It meets ASME B18.3 specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, ensuring environmental safety and quality assurance.
