S-90276A573 1/4"-20 x 4 1/2" ASME B18.6.3 Steel Round Head Slotted Screws
Steel Round Head Slotted 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
- Enhanced corrosion resistance with zinc-plated steel construction, extending service life in demanding industrial environments
- Superior load-bearing capacity with 60,000 psi tensile strength and Rockwell B69 hardness for reliable performance under stress
- Optimized thread engagement through Class 2A fit and UNC coarse threading, ensuring vibration-resistant fastening
- Simplified installation and removal with standard slotted drive design compatible with common hand tools
- Versatile partial threading allowing precise clamping force control across various material thicknesses
- Regulatory compliance assurance meeting ASME B18.6.3 specifications and international environmental standards
- Secure rounded head profile providing smooth surface finish while maintaining structural integrity
Professional Applications & Engineering Value
Engineered for industrial machinery assembly and heavy-duty equipment manufacturing, this zinc-plated steel rounded head screw addresses critical fastening challenges in high-vibration environments. The 1/4-20 UNC coarse thread configuration combined with Class 2A thread fit prevents loosening under dynamic loads, while the partially threaded design enables precise joint compression control. The slotted drive style ensures compatibility with standard maintenance tools, reducing installation time in production line applications and field service scenarios. The zinc plating provides essential corrosion protection for outdoor equipment and industrial settings where moisture resistance is paramount.
Specification Summary & Compliance
This fastener maintains Class 2A thread tolerance per UNC standards with 4 1/2" length and 1 1/2" minimum thread length. Manufacturing complies with ASME B18.6.3 specifications for dimensional accuracy and performance. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring restricted substance adherence for global industrial applications.
