S-91375A486 7/8"-9 x 3 1/2" 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 corrosion resistance with black-oxide coating, extending service life in demanding industrial environments
- Exceptional torque transmission through 1/2" hex drive design, preventing tool slippage during high-tension applications
- Precision Class 3A thread fit ensures secure fastening with minimal vibration-induced loosening in machinery assemblies
- Enhanced gripping power from cup point tip design, creating permanent positioning in shafts and rotating components
- Heavy-duty durability with Rockwell C45 hardness, maintaining structural integrity under repeated stress cycles
- Reliable coarse threading (7/8"-9 UNC) enables quick installation and superior resistance to cross-threading
- Space-saving headless configuration allows flush mounting where protruding fasteners aren't feasible
Professional Applications & Engineering Value
Engineered for precision shaft locking and component positioning, this black-oxide alloy steel set screw solves critical alignment challenges in power transmission systems and rotating assemblies. The cup point design bites into mating surfaces, creating permanent mechanical locks that withstand high rotational forces without compromising shaft integrity. With Rockwell C45 hardness and Class 3A thread fit, it maintains clamping force under extreme vibration—making it ideal for industrial machinery, automotive pulleys, and conveyor systems. The corrosion-resistant black-oxide finish ensures reliable performance in humid or chemically aggressive environments, while the 1/2" hex drive accommodates standard industrial tools for efficient maintenance operations.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with material certification to ASTM F912. Features precision 7/8"-9 UNC coarse threads with Class 3A fit for superior dimensional accuracy. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.
