S-91385A176 1/2"-20 x 2" 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 thread locker that maintains locking integrity from -50°F to 250°F
- Exceptional durability through black-oxide alloy steel construction with Rockwell C45 hardness for long service life
- Precise thread engagement with Class 3A thread fit ensuring tight tolerances and reliable fastening
- Easy installation and removal with 1/4" hex drive design in headless configuration for confined spaces
- Enhanced gripping capability through cup tip design that provides concentrated contact pressure
- Industry-standard compatibility with UNF fine thread (1/2"-20) specification for broad application use
- Environmental compliance meeting RoHS 3, REACH, and ASME B18.3 standards for regulated industries
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers critical vibration resistance in demanding industrial applications where UNF fine threads and Class 3A precision are essential for maintaining positional accuracy. The nylon patch thread locker provides reliable locking without compromising the Rockwell C45 hardness of the base material, ensuring consistent performance across temperature extremes from -50°F to 250°F. The headless design with hex drive allows for flush mounting in machinery, automotive components, and precision equipment where space constraints and vibration-induced loosening pose significant engineering challenges. The cup tip configuration concentrates clamping force for secure shaft positioning in pulleys, gears, and collars.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit precision for superior dimensional accuracy. The UNF 1/2"-20 fine thread configuration ensures optimal engagement in critical applications. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, with material certification to ASTM F912 standards. Right-hand thread direction with 2" length provides versatile installation options across industrial fastening requirements.
