S-90276A551 1/4"-20 x 2 1/4" 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
- Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
- High mechanical strength with 60,000 psi tensile strength and Rockwell B69 hardness for reliable load-bearing performance
- Optimized thread engagement with UNC coarse threading and Class 2A fit ensuring secure fastening and vibration resistance
- Simplified installation and removal through standard slotted drive design compatible with common tools
- Versatile partial threading allowing precise clamping force control across various material thicknesses
- Rounded head profile providing reduced surface protrusion and improved aesthetic integration
- Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards
Professional Applications & Engineering Value
These zinc-plated steel rounded head screws deliver critical performance advantages in industrial assembly applications where corrosion resistance and mechanical reliability are paramount. The combination of 60,000 psi tensile strength and Rockwell B69 hardness ensures dependable performance under static and dynamic loads, while the UNC coarse thread configuration provides excellent engagement in both metallic and non-metallic substrates. The partially threaded design allows engineers to precisely control clamping force distribution, preventing material distortion in sensitive assemblies. With their slotted drive compatibility and rounded head profile, these fasteners streamline maintenance operations while minimizing snag hazards in machinery and equipment applications.
Specification Summary & Compliance
This 1/4-20 screw features precise Class 2A thread fit tolerances and UNC coarse threading per ASME standards. Manufacturing complies with ASME B18.6.3 specifications for dimensional accuracy and mechanical properties. The product meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) regulations for chemical safety, ensuring environmental responsibility in industrial supply chains.
