S-91251A868 3/4"-10 x 13" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
• Superior corrosion resistance from the black-oxide finish extends service life in harsh environments, minimizing maintenance and replacement costs.
• Precise Class 3A thread fit provides secure, vibration-resistant connections, enhancing assembly integrity and reducing loosening over time.
• High hardness rating (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated use and tough conditions.
• Partially threaded design allows for optimal clamping force control, ideal for applications requiring specific grip range and alignment.
• Hex socket drive (5/8") enables easy installation with standard tools, speeding up assembly while providing high torque capability.
• Compliance with ASTM A574, RoHS 3, and REACH ensures material consistency, environmental safety, and global regulatory acceptance for diverse projects.

Professional Applications & Engineering Value

Engineered for demanding industrial settings, this 3/4"-10 UNC Socket Head Cap Screw delivers robust performance where reliability is critical. The black-oxide alloy steel construction combats corrosion effectively, making it suitable for outdoor machinery, automotive assemblies, and heavy equipment exposed to moisture or chemicals. Its coarse UNC threads and Class 3A fit provide superior grip in soft materials or high-vibration environments, preventing stripping and ensuring long-term joint stability. With a partially threaded shank, it offers precise clamping in structural frameworks, conveyor systems, and manufacturing jigs, reducing the need for additional components. This screw addresses common pain points like fastener fatigue and installation inefficiency, supporting faster, safer operations in construction, aerospace, and industrial maintenance.

Specification Summary & Compliance

This screw features a 3/4"-10 UNC coarse thread with Class 3A precision fit for tight tolerances and minimal backlash. Dimensions include a 13" length, 1 1/8" head diameter, and 2" minimum thread length, manufactured to ASTM A574 specifications for consistent quality. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material traceability in global supply chains.