S-91375A728 1/2"-13 x 4 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 on alloy steel, extending service life in harsh industrial environments
- Exceptional thread precision with Class 3A fit ensuring reliable, vibration-resistant fastening in high-stress applications
- Maximum torque transmission through 1/4" hex drive design, preventing tool slippage during installation
- Optimized grip and seating with cup tip configuration, minimizing component damage while maintaining secure positioning
- Enhanced mechanical strength from Rockwell C45 hardness, providing durable performance under heavy loads
- Space-saving headless design allowing flush mounting where clearance is limited
- Industry-standard compatibility with UNC coarse threads for quick assembly and disassembly operations
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers critical engineering solutions for industrial machinery, automotive components, and precision equipment. The Class 3A thread fit combined with UNC coarse threading ensures rapid assembly while maintaining exceptional vibration resistance in high-torque applications. The headless design with hex drive provides reliable fastening in confined spaces where traditional bolt heads cannot be accommodated. The cup tip configuration concentrates clamping force for secure component positioning without causing surface damage. With Rockwell C45 hardness and corrosion-resistant black-oxide finish, this set screw maintains structural integrity in demanding environments including manufacturing equipment, rotational assemblies, and outdoor applications where moisture and chemical exposure are concerns.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread tolerance for precision fit. Features 1/2"-13 UNC coarse threads with right-hand orientation and 4-1/2" length. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.
