S-91381A581 5/16"-18 x 3/4" 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 alloy steel construction, ideal for harsh industrial environments.
- Exceptional holding power ensured by Class 3A thread fit for precise, reliable fastening in high-vibration applications.
- Non-marring brass tip protects sensitive surfaces from damage during installation and adjustment.
- High durability with Rockwell C28 hardness, providing long service life under mechanical stress.
- Easy installation and removal using a standard 5/32" hex drive, compatible with common tools.
- Optimized for coarse thread (UNC) applications, offering quick assembly and strong engagement in various materials.
- Compliance with industry standards including ASME B18.3, ensuring consistent quality and performance.
Professional Applications & Engineering Value
This 5/16"-18 UNC set screw is engineered to address common industrial challenges such as component slippage and surface damage. The black-oxide alloy steel material provides enhanced corrosion resistance, extending service life in demanding conditions like outdoor machinery or humid settings. Its Class 3A thread fit and coarse UNC threads deliver superior grip and vibration resistance, preventing loosening in dynamic assemblies such as motor shafts, pulleys, and gears. The integrated brass tip ensures non-marring contact, making it ideal for precision equipment and finished surfaces where aesthetics and integrity are critical. By combining robust materials with precise engineering, this set screw offers reliable performance in automotive, aerospace, and manufacturing applications, reducing maintenance needs and downtime.
Specification Summary & Compliance
This set screw adheres to Class 3A thread fit for high precision and meets ASME B18.3 standards for dimensional accuracy. It is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are followed. The specifications include a thread size of 5/16"-18 UNC, length of 3/4", and drive size of 5/32" hex, providing consistent performance in industrial fastening systems.
