S-91375A815 5/8"-18 x 3/8" 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 finish, extending service life in demanding industrial environments.
- Exceptional thread precision with Class 3A fit ensures reliable, vibration-resistant fastening in critical assemblies.
- High-strength alloy steel construction with Rockwell C45 hardness provides excellent durability and load-bearing capacity.
- Secure, flush mounting via headless hex drive design, ideal for space-constrained applications.
- Enhanced grip and minimal surface damage from the cup tip, protecting expensive components during installation.
- Broad regulatory compliance including RoHS 3 and REACH, ensuring safe use in global markets.
- Fine UNF thread profile offers superior adjustment precision compared to coarse threads.
Professional Applications & Engineering Value
This 5/8"-18 UNF set screw is engineered to address common industrial fastening challenges, such as component slippage and thread wear. The black-oxide alloy steel material provides a robust barrier against rust and oxidation, crucial for machinery operating in humid or corrosive settings. Its headless design with a 5/16" hex drive allows for seamless integration into tight spaces, preventing protrusion and maintaining a clean assembly profile. The Class 3A thread fit and fine thread spacing deliver superior clamping force and resistance to loosening under dynamic loads, making it ideal for precision equipment, automotive systems, and heavy-duty industrial machinery where reliability is non-negotiable.
Specification Summary & Compliance
This set screw adheres to Class 3A thread fit tolerances per UNF standards, ensuring precise engagement and minimal backlash. It conforms to ASME B18.3 and ASTM F912 specifications for dimensional accuracy and mechanical properties. Additionally, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and material restrictions adherence.
