S-8077A594 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 thanks to 316 stainless steel construction, ideal for harsh environments like marine or chemical processing.
- Enhanced durability and wear resistance from the black oxide finish, which adds a protective layer against abrasion.
- Precise alignment and secure pivoting with a long 3 3/4" shoulder and controlled diameter tolerance for consistent performance in assemblies.
- High-strength fastening with a tensile strength of 70,000 psi and shear strength of 35,000 psi, ensuring reliability under heavy loads.
- Secure, slip-resistant installation facilitated by the knurled socket head and hex drive, allowing for high torque application.
- Wide compatibility and easy assembly with the 5/16"-18 UNC coarse thread and Class 3A fit, providing a tight, precise thread engagement.
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring quality and environmental safety.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical challenges in industrial settings, such as corrosion and mechanical stress. The black oxide finish enhances surface durability, reducing wear in high-friction applications like machinery linkages and rotating assemblies. Its UNC coarse thread and Class 3A thread fit ensure quick, secure fastening with minimal risk of cross-threading, while the long shoulder length provides stable support for components like gears and pulleys. Ideal for precision engineering in automotive, aerospace, and manufacturing, this fastener delivers consistent performance in demanding environments, helping to minimize downtime and maintenance costs.
Specification Summary & Compliance
This shoulder screw adheres to precise dimensional standards, including a Class 3A thread fit for tight tolerances and a shoulder diameter tolerance of -0.004" to -0.002". It conforms to ASME B18.3 specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring it meets rigorous industrial and environmental regulations for safe, reliable use.
