S-91375A427 5/8"-18 x 1 1/4" 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 through black-oxide coating, extending service life in demanding industrial environments
- Exceptional thread precision with Class 3A fit ensures reliable, vibration-resistant fastening in critical applications
- High-strength performance from Rockwell C45 hardened alloy steel prevents stripping and maintains clamping force
- Secure installation and removal with 5/16" hex drive design, providing excellent torque transmission
- Optimized surface contact with cup tip design distributes pressure evenly for superior component retention
- Space-saving headless configuration allows for flush mounting where clearance is limited
- Regulatory compliance assurance meets ASME B18.3, ASTM F912, RoHS 3, and REACH standards for global acceptance
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers exceptional engineering value in industrial applications where vibration resistance and corrosion protection are critical. The 5/8"-18 UNF fine threads with Class 3A precision fit provide superior engagement in components subjected to dynamic loads, preventing loosening in machinery, automotive assemblies, and power transmission systems. The headless design with 5/16" hex drive enables installation in confined spaces while maintaining high torque capability. The cup tip configuration creates secure, mar-resistant contact points on shafts and collars, making these set screws ideal for permanent positioning applications in manufacturing equipment, robotics, and heavy machinery where reliability cannot be compromised.
Specification Summary & Compliance
This set screw features 5/8"-18 UNF fine threads with Class 3A thread fit for precision engagement, manufactured to ASME B18.3 specifications and ASTM F912 material standards. The 1 1/4" length and 0.625" thread diameter provide optimal fastening dimensions for industrial applications. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring global acceptance for industrial and manufacturing use.
