S-90289A534 1/4"-20 x 5/16" 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 serrations locking type, preventing loosening under vibration and high stress.
- High-strength durability with Rockwell C45 hardness alloy steel, ensuring reliable performance in demanding applications.
- Precise, secure fastening thanks to Class 3A thread fit and UNC coarse thread, enabling quick installation and reduced cross-threading risk.
- Easy installation and removal with 1/8" hex drive, allowing efficient maintenance with standard tools.
- Effective surface grip from the cup tip design, minimizing component damage while providing firm contact.
- Broad compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for safe, regulated use.
Professional Applications & Engineering Value
This black-oxide alloy steel set screw is engineered to address common industrial challenges like vibration-induced loosening and corrosion. The serrations locking mechanism ensures a firm grip on shafts and collars, making it ideal for machinery, automotive assemblies, and precision equipment where UNC coarse threads facilitate faster assembly. With a Rockwell C45 hardness and headless design, it provides high shear strength and space-saving benefits in confined areas. The cup tip distributes pressure evenly, reducing marring on surfaces, while the hex drive allows for straightforward torque application. Compliant with ASME B18.3, it delivers consistent performance in industrial set screws applications, ensuring reliability and reducing maintenance downtime.
Specification Summary & Compliance
This set screw features a 1/4"-20 UNC thread with Class 3A thread fit for precise tolerances and coarse thread spacing. It adheres to ASME B18.3 manufacturing specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity.
