S-91385A363 1/4"-28 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
- Superior vibration resistance with nylon patch locking that maintains integrity from -50°F to 250°F, preventing loosening in dynamic applications
- Exceptional durability from Rockwell C45 hardened black-oxide alloy steel that resists wear and corrosion in demanding environments
- Precise thread engagement with Class 3A UNF fine threads ensuring tight, secure fastening with minimal play
- Space-saving headless design with 1/8" hex drive for flush installation where clearance is limited
- Enhanced gripping power from the cup tip design that bites into materials for superior holding strength
- Industry-standard compliance meeting ASME B18.3 specifications for reliable, interchangeable performance
- Environmental responsibility with RoHS 3 and REACH compliance for safe use in regulated industries
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers critical performance in applications where vibration resistance and space constraints are primary concerns. The combination of Class 3A UNF fine threads and nylon patch locking addresses the common industrial challenge of fastener loosening under continuous stress, while the headless hex drive design enables installation in confined assemblies. The cup tip configuration provides maximum bite into shafts and components, preventing slippage in power transmission systems, machinery adjustment points, and precision equipment. Engineered for industrial set screw applications requiring reliable, long-term fastening solutions, this component maintains its locking capabilities across a wide temperature range from -50°F to 250°F.
Specification Summary & Compliance
This set screw features 1/4"-28 UNF fine threads with Class 3A thread fit for precision engagement, manufactured to ASME B18.3 specifications ASTM F912. The component is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial use worldwide.
