S-8077A564 1/2"-13 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 industrial environments and chemical exposure
- Enhanced durability and wear resistance from the black oxide finish, providing long-lasting performance under demanding conditions
- Precise component alignment and smooth rotation enabled by the 2 1/2" shoulder with tight diameter tolerance
- High-strength performance under load with 70,000 psi tensile strength and 35,000 psi shear strength for heavy-duty applications
- Secure, non-slip installation thanks to the knurled socket head and 3/8" hex drive for reliable torque transmission
- Accurate and reliable thread engagement with Class 3A thread fit and coarse UNC threading for quick assembly
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH for assured quality and environmental safety
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw with black oxide finish is engineered to address critical challenges in precision machinery and industrial equipment. The 1/2"-13 UNC coarse thread and Class 3A thread fit ensure fast, secure fastening in high-vibration environments, reducing assembly time and maintenance needs. The 2 1/2" shoulder length with controlled tolerances provides exact positioning for rotating components like gears, pulleys, and linkages, minimizing misalignment and wear. With 70,000 psi tensile strength and excellent corrosion resistance, it delivers reliable performance in automotive, aerospace, and marine applications where shoulder screws must withstand heavy loads and aggressive conditions without failure.
Specification Summary & Compliance
This shoulder screw features a 1/2"-13 UNC thread with Class 3A fit for precise engagement, and a shoulder diameter of 3/4" with tolerance of -0.004" to -0.002" for accurate alignment. It meets ASME B18.3 specifications for dimensional consistency and is manufactured from 316 stainless steel with a black oxide finish. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring adherence to environmental and safety regulations for industrial use.
