S-91251A681 7/16"-14 x 3" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 PSI ensures reliable performance under high-stress conditions, reducing the risk of fastener failure.
• Superior corrosion resistance from the black-oxide coating extends service life in demanding industrial environments.
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies in critical applications.
• High hardness rating (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated use.
• Partially threaded design allows for controlled clamping force and easier alignment in assembled components.
• 3/8" hex drive compatibility enables high-torque installation with standard tools, speeding up assembly processes.
• Coarse UNC threads facilitate quick installation and reduce cross-threading risks in time-sensitive operations.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these black-oxide alloy steel socket head cap screws deliver exceptional performance where reliability is non-negotiable. The 7/16"-14 UNC coarse thread configuration ensures rapid assembly in machinery, automotive systems, and structural frameworks, while the partially threaded rod type provides precise unthreaded shank sections for improved shear strength. The black-oxide surface treatment significantly enhances corrosion resistance without compromising dimensional accuracy, making these fasteners ideal for harsh operating conditions. With their 3/8" hex drive and standard socket head profile, they enable efficient high-torque installation in confined spaces, reducing assembly time and labor costs in manufacturing and maintenance operations.

Specification Summary & Compliance

This socket head cap screw features precise Class 3A thread fit with 7/16"-14 UNC coarse threads and 3" length with minimum thread length of 1-3/8". Manufactured to ASTM A574 specifications, it maintains dimensional accuracy and mechanical properties for consistent performance. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental and safety standards for industrial use.