S-91375A412 9/16"-18 x 1 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 holding power from Rockwell C45 hardness, preventing deformation under high torque applications
- Precise thread engagement with Class 3A fit, ensuring reliable fastening without cross-threading issues
- Optimal material penetration from cup point design, creating permanent seating in shafts and collars
- Space-saving headless construction allowing flush mounting where protruding fasteners aren't feasible
- Easy installation and removal with standardized 1/4" hex drive, compatible with common industrial tools
- Regulatory compliance assurance meeting international standards for safety and environmental requirements
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers critical performance in precision machinery and power transmission systems where vibration resistance and permanent positioning are paramount. The 9/16"-18 UNF fine thread with Class 3A precision fit provides superior thread engagement in tapped holes, while the cup point design bites deeply into mating surfaces to prevent rotational slippage in high-torque applications. Engineered for industrial set screw applications involving gears, pulleys, and collars, the combination of Rockwell C45 hardness and black-oxide surface treatment ensures long-term reliability in manufacturing equipment, automotive assemblies, and heavy machinery where vibration loosening would compromise operational safety.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications and ASTM F912 material standards, this set screw maintains Class 3A thread fit tolerances for precision applications. The product is fully compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations for chemical safety. The right-hand thread with fine thread spacing (18 TPI) ensures secure fastening in high-vibration environments, while the standardized 1/4" hex drive provides consistent torque application across industrial applications.
