S-91375A824 5/8"-18 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
- Superior corrosion resistance with black-oxide coating that protects against rust in demanding industrial environments
- Exceptional thread precision with Class 3A fit ensuring tight, secure fastening without play or vibration loosening
- Maximum torque transmission through 5/16" hex drive design that prevents tool slippage during installation
- Enhanced material strength with Rockwell C45 hardness providing reliable performance under heavy loads
- Optimized grip performance with cup tip design that creates secure contact points on shaft surfaces
- Industry-standard compliance meeting ASME B18.3 specifications for consistent quality and interchangeability
- Environmental responsibility with RoHS 3 and REACH compliance for sustainable manufacturing practices
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers critical engineering solutions for industrial applications requiring precise positioning and secure locking. The 5/8"-18 UNF fine threads with Class 3A fit provide exceptional accuracy in machinery assembly, preventing backlash in gears, pulleys, and collars. The headless hex drive design allows for flush mounting in confined spaces while the cup tip creates concentrated pressure points that resist rotational forces. Engineered with Rockwell C45 hardness, this fastener maintains integrity in high-vibration environments common in manufacturing equipment, automotive systems, and power transmission applications. The black-oxide surface treatment offers corrosion protection without dimensional changes, making it ideal for precision assemblies where tolerance stacking is critical.
Specification Summary & Compliance
This set screw features 5/8"-18 UNF fine threads with Class 3A thread fit for precision applications, manufactured to ASME B18.3 specifications (ASTM F912). The 2 1/2" length and 0.625" thread diameter provide consistent dimensional accuracy. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring responsible manufacturing practices for industrial use.
