S-90289A578 5/16"-18 x 1/2" ASME B18.3 Set Screws
Set 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 black-oxide coating, extending service life in harsh industrial environments
- Exceptional holding power from Rockwell C45 hardness, preventing deformation under high-stress applications
- Precise thread engagement with Class 3A fit, ensuring reliable fastening and vibration resistance
- Easy installation and removal using standard 5/32" hex drive tools, reducing assembly time
- Enhanced grip and anti-loosening through serrations locking mechanism, maintaining position in dynamic loads
- Broad compatibility with UNC coarse threads, suitable for various industrial components and machinery
- Regulatory compliance with ASME B18.3, RoHS, and REACH, meeting global safety and environmental standards
Professional Applications & Engineering Value
This black-oxide alloy steel set screw is engineered to address critical challenges in industrial fastening, such as component slippage and corrosion-induced failure. The headless design with hex drive allows for flush mounting in confined spaces, while the UNC coarse threads and Class 3A precision fit provide rapid installation and secure retention in materials like shafts, pulleys, and gears. The cup point tip bites into surfaces, creating a permanent lock that resists rotational forces and vibrations common in machinery and automotive assemblies. Combined with Rockwell C45 hardness, it delivers consistent performance in heavy-duty applications, reducing maintenance downtime and ensuring operational reliability.
Specification Summary & Compliance
This set screw features a 5/16"-18 UNC coarse thread with Class 3A thread fit for high precision and durability. It adheres to ASME B18.3 manufacturing standards and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity. The right-hand thread direction and serrations locking type further enhance its reliability in industrial fastening systems.
