S-96660A171 1/4"-20 x 1/2" Steel Flanged Button Head Hex-Drive Screws
Steel Flanged 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 that protects against rust in demanding industrial environments
- Exceptional holding power from the integrated flange design that distributes load evenly and prevents pull-through
- High-strength performance with 120,000 psi tensile strength and Rockwell C32 hardness for heavy-duty applications
- Precise thread engagement with Class 3A UNC coarse threads ensuring reliable fastening and vibration resistance
- Easy installation using standard 5/32" hex drive tools for quick assembly and reduced labor time
- Full threading coverage along the entire 1/2" length provides maximum grip in various material thicknesses
- Regulatory compliance meeting RoHS 3 and REACH standards for safe use in global industrial markets
Professional Applications & Engineering Value
These zinc-plated alloy steel rounded head screws deliver critical performance advantages in industrial assembly where vibration resistance and corrosion protection are paramount. The Class 3A UNC coarse thread configuration ensures rapid installation while maintaining precise fit in machinery, equipment frames, and structural components. The combination of 120,000 psi tensile strength with the flange design eliminates the need for separate washers, reducing part count and assembly time. The hex drive compatibility allows for high-torque installation in confined spaces, making these fully threaded screws ideal for automotive, manufacturing, and heavy equipment applications where reliability cannot be compromised.
Specification Summary & Compliance
This 1/4"-20 x 1/2" rounded head screw features precise Class 3A thread fit with UNC coarse spacing (20 TPI) and right-hand threading. Manufactured from zinc-plated alloy steel with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. The screw maintains dimensional accuracy with 0.563" flange diameter, 0.132" head height, and consistent thread diameter of 0.25" throughout the 1/2" length, ensuring reliable performance in industrial fastening applications.
