S-90910A536 1/4"-20 x 3" ASME B18.3, ASTM F835 Steel Button Head Torx Plus Screws
Steel Button Head Torx Plus 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 torque transmission with Torx Plus IP27 drive that prevents cam-out and extends tool life
- Exceptional corrosion resistance through zinc-plated alloy steel construction for long-term durability in harsh environments
- High-strength performance with 120,000 psi tensile strength and Rockwell C39 hardness for demanding applications
- Precise thread engagement with Class 3A UNC coarse threads ensuring reliable fastening in industrial assemblies
- Optimized load distribution through rounded button head design that reduces surface stress and improves aesthetics
- Enhanced installation efficiency with partially threaded design providing controlled clamping force
- Full regulatory compliance meeting ASME B18.3, RoHS 3, and REACH standards for global industrial use
Professional Applications & Engineering Value
These zinc-plated alloy steel screws deliver critical performance advantages for industrial fastening systems where vibration resistance and long-term reliability are paramount. The Torx Plus IP27 drive system eliminates common installation issues like screw head stripping while maximizing torque transfer efficiency. Engineered with Class 3A UNC coarse threads and partial threading, these fasteners provide superior grip in materials where full threading isn't required, reducing assembly time while maintaining 120,000 psi tensile strength. The rounded button head profile offers a clean finished appearance while distributing clamp load effectively. Ideal for machinery, equipment manufacturing, and structural applications requiring ASME B18.3 compliance and environmental regulation adherence.
Specification Summary & Compliance
This 1/4"-20 UNC screw features precise Class 3A thread fit with coarse thread spacing and 2" minimum thread length. Manufacturing specifications conform to ASME B18.3 standards (ASTM F835) with complete compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The 3" length with partial threading and Rockwell C39 hardness ensures consistent performance across industrial applications.
