S-90289A546 1/4"-20 x 1 1/2" ASME B18.3 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 for extended service life in harsh industrial environments
- Exceptional holding power achieved through Class 3A thread fit ensuring tight, reliable fastening in critical applications
- Enhanced locking capability with serrations that prevent loosening under vibration and dynamic loads
- High-strength performance from alloy steel construction with Rockwell C45 hardness for durable, long-term use
- Easy installation and removal with 1/8" hex socket drive providing secure tool engagement without head protrusion
- Optimized material transfer through cup tip design that concentrates clamping force for superior grip
- Industry-standard compatibility with UNC coarse 1/4"-20 threads suitable for most industrial equipment and machinery
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers critical engineering solutions for industrial applications where vibration resistance and reliable positioning are paramount. The headless design with hex socket drive allows flush mounting in confined spaces while maintaining high torque capability. The Class 3A thread fit combined with UNC coarse threads ensures precise engagement and eliminates play in assemblies subject to dynamic stresses. The serrations locking feature provides permanent fastening security, making these set screws ideal for securing gears, pulleys, and collars on rotating shafts in machinery, automotive, and manufacturing equipment. The black-oxide surface treatment offers superior corrosion protection, extending component life in demanding environments where moisture and chemicals are present.
Specification Summary & Compliance
Manufactured to exacting ASME B18.3 specifications with Class 3A thread fit tolerance for precision engagement. Features 1/4"-20 UNC coarse threads with right-hand direction and cup tip configuration. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.
