S-90289A366 3/8"-24 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 demanding industrial environments.
- Exceptional holding power from serrations that bite into mating surfaces, preventing loosening under vibration.
- High-strength construction with Rockwell C45 hardened alloy steel for reliable performance in high-stress applications.
- Precise thread engagement with Class 3A fine UNF threads ensuring a tight, secure fit and reduced risk of stripping.
- Easy installation and removal using a standard 3/16" hex key in the headless design, ideal for confined spaces.
- Effective point contact from the cup tip, concentrating clamping force for a firm grip on shafts and components.
- Compliance with major standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory acceptance.
Professional Applications & Engineering Value
This black-oxide alloy steel set screw is engineered to address common industrial challenges such as component slippage and corrosion-induced failure. Its headless hex drive and fine UNF threads allow for compact, secure fastening in machinery, automotive, and aerospace assemblies where space is limited. The serrations provide enhanced locking against rotational forces, while the cup tip ensures minimal surface damage during installation. Made from hardened alloy steel with a protective oxide finish, it resists rust and wear, making it ideal for high-strength set screw applications in harsh environments. This design maximizes assembly integrity and reduces maintenance needs, supporting efficient production workflows.
Specification Summary & Compliance
This set screw features a 3/8"-24 UNF fine thread with Class 3A fit for high precision and strength. It complies with ASME B18.3 specifications for dimensional accuracy and is certified RoHS 3 and REACH compliant, ensuring adherence to environmental and safety regulations. The Rockwell C45 hardness and black-oxide surface treatment further guarantee durability and performance in industrial settings.
