S-94495A283 3/8"-24 x 1/2" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior vibration resistance with nylon patch thread locker that maintains locking performance from -70° to 250°F
• Exceptional holding power through Class 3A thread fit precision and Rockwell C45 hardness for reliable fastening in demanding applications
• Corrosion-resistant black-oxide finish on alloy steel construction extends service life in industrial environments
• Secure installation and removal with hex drive design that prevents tool slippage and ensures consistent torque application
• Space-saving headless design allows for flush mounting where clearance is limited
• Fine thread spacing provides superior clamping force distribution and resistance to loosening under dynamic loads
• Regulatory compliance assurance with ASME B18.3 standards and environmental regulations including RoHS 3 and REACH

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers critical performance in precision assembly applications where vibration resistance and positional security are paramount. The combination of Class 3A UNF fine threads and nylon patch thread locker addresses the common industrial challenge of fastener loosening in machinery, automotive components, and power transmission systems. The Rockwell C45 hardness rating ensures the fastener maintains its structural integrity under repeated stress cycles, while the temperature-resistant thread locker remains effective across extreme operating conditions from sub-zero to high-temperature environments. The headless configuration with hex drive provides optimal accessibility in confined spaces while preventing rotational slippage during installation, making it ideal for securing collars, gears, and pulleys on shafts where reliable positioning is critical to system performance.

Specification Summary & Compliance

This 3/8"-24 UNF set screw features precision Class 3A thread fit with fine thread spacing for superior engagement. Manufactured to ASME B18.3 specifications (ASTM F912) with Rockwell C45 hardness for consistent performance. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global markets. The black-oxide surface treatment on alloy steel provides corrosion protection while maintaining dimensional stability.