S-8077A129 3/4"-10 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 and black oxide finish, ideal for harsh industrial environments.
- Exceptional mechanical strength delivering 70,000 psi tensile and 35,000 psi shear strength for reliable performance in heavy-duty applications.
- Precise alignment and secure fit thanks to Class 3A thread fit and controlled shoulder diameter tolerance (-0.004" to -0.002").
- Easy installation and removal with a 1/2" hex drive and knurled head for improved grip and torque application.
- Durability under stress ensured by Rockwell B79 hardness and coarse UNC thread design for reduced wear.
- Broad compatibility with standard UNC threads and ASME B18.3 specifications, facilitating integration into existing assemblies.
- Environmental and regulatory compliance meeting RoHS 3 and REACH standards for safe, sustainable use.
Professional Applications & Engineering Value
This 3/4"-10 UNC shoulder screw in 316 stainless steel with a black oxide finish addresses critical engineering challenges in high-stress environments. Its Class 3A thread fit and precise shoulder diameter tolerance ensure exact alignment in machinery, reducing vibration and misalignment issues. The coarse UNC thread and knurled head enhance installation efficiency, while the material's inherent corrosion resistance extends service life in applications like automotive assemblies, industrial equipment, and precision tooling. By combining high tensile strength and shear resistance, it provides reliable fastening in heavy-duty scenarios, minimizing downtime and maintenance costs.
Specification Summary & Compliance
This shoulder screw features a Class 3A thread fit with UNC coarse threads, ensuring tight tolerances for secure fastening. It adheres to ASME B18.3 manufacturing standards, with shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005". The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and regulatory acceptance in global markets.
