S-91375A407 9/16"-18 x 3/4" 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 corrosion resistance with black-oxide coating that protects against rust in demanding industrial environments
- Exceptional thread precision with Class 3A fit ensuring reliable, vibration-resistant fastening in critical applications
- High-strength performance backed by Rockwell C45 hardness for maximum durability under heavy loads
- Secure installation with 1/4" hex drive providing positive torque control without head protrusion
- Enhanced grip capability through cup tip design that creates positive seating on shaft surfaces
- Fine thread advantage offering better adjustment precision and reduced loosening in vibrating equipment
- 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 exceptional engineering value in precision assembly applications where space constraints and vibration resistance are critical concerns. The headless design allows for flush mounting in tight spaces while the 9/16"-18 UNF fine thread with Class 3A fit provides superior holding power in pulleys, gears, and collars. The combination of Rockwell C45 hardness and black-oxide surface treatment ensures long-term reliability in industrial machinery, automotive components, and power transmission systems where corrosion resistance and maintained clamping force are essential. The cup tip configuration creates positive engagement with shaft surfaces, preventing slippage in high-torque applications.
Specification Summary & Compliance
This precision set screw features 9/16"-18 UNF fine threads with Class 3A thread fit for exceptional dimensional accuracy and tight tolerances. Manufactured to ASME B18.3 specifications using high-strength alloy steel with black-oxide coating. Fully compliant with RoHS 3 (2015/863/EU) environmental directives and REACH (EC 1907/2006) regulations regarding substance restrictions. The right-hand thread direction with fine spacing provides optimal performance in precision mechanical assemblies requiring secure fastening without protrusion.
