S-91375A454 5/8"-18 x 4 1/2" ASME B18.3, ASTM F912 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 provided by the cup tip design, ensuring secure and permanent component positioning.
- High-strength construction from alloy steel with Rockwell C45 hardness, offering reliable performance under heavy loads.
- Precise and secure fit with a Class 3A thread fit and fine UNF threads, minimizing the risk of loosening from vibration.
- Easy installation and removal using a standard 5/16" hex key, simplifying maintenance in confined spaces due to the headless design.
- Compliance with major industry standards including ASME B18.3 and ASTM F912, guaranteeing consistent quality and interchangeability.
- Environmental regulation adherence through RoHS 3 and REACH compliance, making it suitable for global supply chains.
Professional Applications & Engineering Value
This black-oxide alloy steel set screw is engineered to address critical challenges in precision machinery and heavy-duty equipment. The headless design with a hex drive allows for flush mounting in tight spaces, preventing interference while the cup tip bites into the shaft for a non-slip, permanent grip. Its 5/8"-18 UNF fine thread and Class 3A fit provide superior resistance to vibrational loosening, a common failure point in dynamic systems. Made from high-hardness alloy steel, it withstands high torque and repetitive stress, making it an ideal fastening solution for pulleys, gears, and collars in manufacturing, automotive, and aerospace applications where reliability is non-negotiable.
Specification Summary & Compliance
This set screw features a 5/8"-18 UNF fine thread with a precision Class 3A thread fit for tight tolerances. It is manufactured in accordance with ASME B18.3 and ASTM F912 specifications, ensuring dimensional accuracy and mechanical performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free of restricted hazardous substances and safe for industrial use worldwide.
