S-91375A813 5/8"-18 x 7/8" 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 thread precision with Class 3A fit ensures secure, vibration-resistant fastening in critical assemblies
- High-strength alloy steel construction with Rockwell C45 hardness provides reliable load-bearing capacity
- Optimized torque transmission through 5/16" hex drive design prevents tool slippage during installation
- Enhanced gripping performance with cup tip design creates positive seating on shaft surfaces
- Fine UNF thread profile delivers superior holding power compared to coarse thread alternatives
- Space-saving headless design allows flush mounting in confined assembly spaces
Professional Applications & Engineering Value
This black-oxide alloy steel set screw addresses critical engineering challenges in industrial machinery, automotive systems, and precision equipment. The Class 3A thread fit with 5/8"-18 UNF fine threads provides exceptional clamping force and vibration resistance, preventing component loosening in high-stress applications. The headless hex drive configuration enables installation in tight spaces while maintaining full torque capability. The cup tip design creates concentrated contact pressure for secure shaft positioning in pulleys, gears, and collars. Combined with Rockwell C45 hardness, this fastener delivers reliable performance in dynamic loading conditions where precision alignment and permanent positioning are paramount.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit precision, this set screw maintains exacting dimensional tolerances for consistent performance. The 5/8"-18 UNF fine thread profile adheres to unified thread standards, while the 7/8" length provides optimal engagement depth. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental responsibility and workplace safety standards are met for global industrial applications.
