S-94495A268 5/16"-18 x 1" 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
- Permanent vibration resistance with nylon patch thread locker that maintains secure locking from -50° to 250°F
- Superior corrosion protection through black-oxide coating on alloy steel for extended service life in harsh environments
- Precise Class 3A thread fit ensures consistent engagement and reliable clamping force in critical assemblies
- High-strength construction with Rockwell C45 hardness provides exceptional durability under heavy loads
- Secure hex drive installation using standard 5/32" tools prevents stripping and enables precise torque application
- Space-saving headless design allows flush mounting in confined spaces while maintaining full thread engagement
- Industry-standard compliance with ASME B18.3 and ASTM F912 specifications guarantees interchangeability and reliability
Professional Applications & Engineering Value
This 5/16"-18 UNC Class 3A set screw delivers critical vibration resistance in demanding industrial applications where loosening under dynamic loads poses significant safety and performance risks. The black-oxide alloy steel construction combined with Rockwell C45 hardness provides optimal strength-to-weight ratio for heavy-duty machinery components, while the integrated nylon patch thread locker creates a permanent chemical bond that withstands extreme temperature fluctuations from -50° to 250°F. Engineered for precision assemblies in automotive, aerospace, and manufacturing equipment, the coarse UNC threads with Class 3A fit ensure rapid installation and consistent clamping force in pulleys, gears, and coupling applications where reliability is paramount.
Specification Summary & Compliance
Manufactured to exact Class 3A thread tolerances with UNC coarse thread form (5/16"-18) and 5/32" hex drive configuration. Complies with ASME B18.3 dimensional standards and ASTM F912 material specifications. Meets environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) standards for hazardous substance restrictions. The right-hand thread direction with flat tip design ensures uniform surface contact and distributed clamping pressure.
