S-94495A334 1/2"-13 x 3/4" 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
- Vibration-resistant locking with permanent nylon patch thread locker prevents loosening under dynamic loads and thermal cycling from -50° to 250°F
- Superior fatigue resistance from Rockwell C45 hardness alloy steel maintains clamping force in high-stress applications
- Precise Class 3A thread fit ensures consistent engagement and reliable torque transmission in critical assemblies
- Corrosion-resistant black-oxide finish provides durable protection while maintaining dimensional accuracy
- Hex drive headless design allows flush mounting and easy installation in confined spaces with standard tools
- Coarse UNC threading enables rapid assembly and disassembly while maintaining strong holding power
- Industry-standard compliance with ASME B18.3 ensures interchangeability and reliable performance
Professional Applications & Engineering Value
Engineered for demanding industrial applications, this black-oxide alloy steel set screw combines high-strength construction with permanent nylon patch thread locking to solve critical fastening challenges. The Class 3A UNC thread system delivers precise fit and consistent torque values, while the Rockwell C45 hardness provides exceptional resistance to wear and deformation. Ideal for securing gears, pulleys, and collars on rotating shafts, this headless set screw maintains reliable clamping force even under extreme vibration and temperature fluctuations from -50° to 250°F. The hex drive design facilitates easy installation in tight spaces, making it perfect for machinery, automotive, and heavy equipment applications where space constraints and vibration resistance are paramount concerns.
Specification Summary & Compliance
This 1/2"-13 UNC Class 3A set screw features precise coarse threading with Class 3A thread fit for superior engagement and torque transmission. Manufactured to ASME B18.3 specifications (ASTM F912) with Rockwell C45 hardness alloy steel construction and black-oxide surface treatment. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.
