S-91375A804 5/8"-11 x 2 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
- Exceptional corrosion resistance with black-oxide coating, extending service life in harsh industrial environments.
- Superior holding power from Class 3A thread fit, ensuring reliable, vibration-resistant fastening in critical assemblies.
- High mechanical strength with Rockwell C45 hardness, providing excellent resistance to deformation under heavy loads.
- Optimized for high-torque installation via 5/16" hex drive, allowing secure tightening without head protrusion in confined spaces.
- Secure component positioning with cup tip design, minimizing surface damage while maintaining firm grip on shafts or collars.
- Wide compatibility with 5/8"-11 UNC coarse threads, enabling quick assembly and disassembly in general industrial applications.
- Regulatory compliance assurance meeting ASME B18.3, ASTM F912, RoHS 3 and REACH standards for global supply chain integration.
Professional Applications & Engineering Value
Engineered for demanding industrial fastening scenarios, this black-oxide alloy steel set screw addresses critical challenges in machinery assembly and power transmission systems. The headless design with hex drive enables flush mounting in rotating components where clearance is limited, while the Class 3A thread fit maintains precise tolerances against vibrational loosening in high-cycle equipment. The cup tip configuration concentrates clamping force without gouging expensive shafts, making it ideal for permanent positioning of gears, pulleys, and couplings. Combined with coarse UNC threads for rapid installation and Rockwell C45 hardness for impact resistance, this fastener delivers reliable performance in automotive, manufacturing, and heavy equipment applications where failure is not an option.
Specification Summary & Compliance
This set screw maintains precision Class 3A thread fit per UNC standards with 5/8"-11 coarse threading and 2-1/2" length. Manufacturing conforms to ASME B18.3 dimensional specifications and ASTM F912 material requirements. The product is fully compliant with RoHS 3 (2015/863/EU) restrictions and REACH (EC 1907/2006) regulations regarding substance control, ensuring environmental responsibility in global industrial supply chains.
