S-97972A113 1/4"-20 x 3/4" Extreme-Strength Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with black-oxide steel coating for extended service life in harsh industrial environments
• Superior load distribution through integrated flange design that eliminates need for separate washers
• High tensile strength rating of 180,000 psi ensures reliable performance under extreme mechanical stress
• Optimized thread engagement with Class 2A UNC coarse threads for faster assembly and reduced cross-threading risks
• Secure installation with external hex drive that provides positive torque transmission and prevents tool slippage
• Full threading capability allows complete penetration through materials for maximum holding power
• Consistent hardness at Rockwell C38 maintains structural integrity through repeated installation cycles

Professional Applications & Engineering Value

This black-oxide steel hex head screw delivers exceptional engineering value through its flanged design that addresses common fastening challenges in industrial assembly. The UNC coarse thread configuration enables rapid installation in various materials while minimizing thread stripping, particularly beneficial in high-volume production environments. The external hex drive provides superior torque transmission for secure fastening in confined spaces. With 180,000 psi tensile strength and Rockwell C38 hardness, this fastener maintains clamping force under vibration and dynamic loads, making it ideal for machinery, equipment manufacturing, and structural applications where corrosion resistance and long-term reliability are critical. The fully threaded design ensures uniform stress distribution across the entire engagement length.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit tolerance for consistent performance in UNC coarse thread applications. The screw features a 1/4"-20 thread size with 3/4" length, 5/16" head width, and 33/64" flange diameter. Complies with industry-standard inch measurement specifications and manufactured using materials that meet RoHS and REACH environmental compliance requirements for industrial use.