S-8077A625 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 from 316 Stainless Steel and Black Oxide finish, ideal for harsh environments and extending service life.
- Exceptional mechanical strength with 70,000 psi tensile and 35,000 psi shear strength for reliable performance under high-stress loads.
- Precise assembly and location ensured by the Class 3A thread fit and standard shoulder fit, minimizing play and misalignment.
- Secure, non-slip installation provided by the knurled socket head and hex drive, allowing for high torque application without stripping.
- Broad industry compatibility through compliance with ASME B18.3 standards, ensuring interchangeability and quality.
- Safe and sustainable material use guaranteed by RoHS 3 and REACH compliance, meeting strict environmental regulations.
- Optimized for coarse threading (UNC) offering faster assembly and reduced cross-threading risk in industrial applications.
Professional Applications & Engineering Value
This 316 Stainless Steel shoulder screw with a Black Oxide finish is engineered to solve critical challenges in machinery assembly, pivoting joints, and precision spacing. The Class 3A thread fit and precisely toleranced shoulder provide a snug, secure fit that eliminates wobble and maintains alignment in rotating parts, reducing wear and maintenance downtime. The combination of high tensile strength and excellent corrosion resistance makes it ideal for demanding environments like chemical processing, marine equipment, and food machinery. The knurled socket head ensures a firm grip for high-torque installation, preventing tool slippage and damage. By meeting ASME B18.3 specifications, this shoulder screw delivers reliable performance and interchangeability in automated systems and heavy-duty industrial applications.
Specification Summary & Compliance
This shoulder screw features a 5/16"-18 UNC thread with a Class 3A fit for high precision. The shoulder diameter and length are manufactured to tight tolerances (e.g., shoulder diameter: -0.004" to -0.002"). It is produced in accordance with ASME B18.3 and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations.
