S-97972A525 1/2"-13 x 4" Extreme-Strength Steel Flanged Hex Head Screws
Extreme-Strength Steel Flanged Hex Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
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Key Features & Benefits at a Glance
- Superior corrosion resistance with black-oxide steel coating for extended service life in harsh environments
- Exceptional holding power with 180,000 psi tensile strength for heavy-duty applications
- Enhanced durability from Rockwell C38 hardness to withstand high-stress conditions
- Quick installation with external hex drive and coarse UNC threads for faster assembly
- Improved load distribution through integrated flange design for more secure fastening
- Reliable thread engagement with Class 2A fit ensuring consistent performance
- Optimized thread design with partial threading for precise clamping force control
Professional Applications & Engineering Value
This black-oxide steel hex head screw delivers exceptional engineering value for demanding industrial applications where corrosion resistance and structural integrity are paramount. The combination of 180,000 psi tensile strength and Rockwell C38 hardness ensures reliable performance in heavy machinery, construction frameworks, and structural assemblies. The UNC coarse thread pattern provides superior resistance to vibration loosening, while the external hex drive enables high-torque installation without stripping. The flanged design eliminates the need for separate washers, streamlining assembly processes in automotive, manufacturing, and infrastructure projects where corrosion-resistant screws must maintain integrity under extreme loads and environmental exposure.
Specification Summary & Compliance
This 1/2"-13 UNC hex head screw features precise Class 2A thread fit per ASME B1.1 standards, ensuring consistent engagement and reliable performance. The 4" length with 1 1/4" minimum thread length provides optimal clamping capability. Manufactured to meet industrial fastener specifications with black-oxide surface treatment that complies with RoHS and REACH environmental standards. The partial threading and external hex drive conform to established industrial fastening protocols for heavy-duty applications.
