S-91306A716 1/4"-20 x 2 1/2" ASTM F835 Steel Button Head Hex-Drive Screws
Steel Button Head Hex-Drive 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 plating for extended service life in harsh industrial environments
- Exceptional holding power from 120,000 psi tensile strength and Rockwell C39 hardness for heavy-duty applications
- Precise thread engagement with Class 3A fit ensuring reliable fastening and vibration resistance
- Easy installation and removal with 5/32" hex drive design providing secure tool engagement
- Full threading coverage along the 2 1/2" length for maximum grip and load distribution
- Wide compatibility with UNC coarse threading (1/4"-20) for standard industrial applications
- Regulatory compliance meeting ASME B18.3 and ASTM F835 standards for quality assurance
Professional Applications & Engineering Value
These zinc-plated alloy steel rounded head screws deliver critical performance advantages for industrial assembly applications where corrosion resistance and structural integrity are paramount. The combination of Class 3A thread fit and UNC coarse threading ensures rapid installation with minimal cross-threading risk while maintaining vibration resistance in dynamic environments. The fully threaded design provides consistent clamping force across the entire 2 1/2" length, making these button head screws ideal for machinery, equipment manufacturing, and structural frameworks requiring reliable fastening under high stress conditions. The hex drive configuration allows for high-torque installation without slippage, while the rounded head profile distributes pressure evenly to prevent surface damage.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 3A thread fit tolerance and UNC 1/4"-20 coarse threading. Complies with ASME B18.3 and ASTM F835 specifications for dimensional accuracy and performance requirements. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards. Features include right-hand threading, standard rounded button head profile, and full threading along the entire 2 1/2" length.
