S-91385A362 1/4"-28 x 1 1/4" 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
- Superior vibration resistance through the integrated nylon patch thread locker, maintaining secure fastening in dynamic applications
- Exceptional corrosion protection with black-oxide coating on alloy steel, extending service life in demanding industrial environments
- Precise installation control enabled by the hex drive design and fine UNF threads, ensuring accurate torque application
- Reliable high-strength performance with Rockwell C45 hardness and Class 3A thread fit, providing consistent clamping force
- Wide temperature compatibility from -50°F to 250°F, making it suitable for diverse operating conditions
- Secure headless design with cup tip for concentrated contact pressure, preventing component slippage
- Full regulatory compliance meeting ASME B18.3, RoHS 3, and REACH standards for global industrial use
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers critical engineering solutions where vibration resistance and positional security are paramount. The nylon patch thread locker effectively counters loosening in high-vibration machinery, automotive assemblies, and precision equipment, while the fine UNF threads and Class 3A fit provide superior clamping force distribution. The cup tip design concentrates pressure on shafts and collars, preventing rotational slip in power transmission components. Manufactured to ASME B18.3 specifications, these headless set screws offer reliable performance in automated systems, manufacturing jigs, and industrial machinery where space constraints and vibration challenges exist.
Specification Summary & Compliance
This 1/4"-28 UNF Class 3A set screw features precise fine thread spacing with tight tolerance Class 3A fit for superior engagement. The black-oxide alloy steel construction provides enhanced durability with Rockwell C45 hardness. Manufacturing complies with ASME B18.3 specifications (ASTM F912) and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards for global industrial applications.
