S-91251A376 3/4"-10 x 5 1/4" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance under extreme loads, reducing the risk of fastener failure in critical applications.
• Superior corrosion resistance from the black-oxide finish extends service life in harsh industrial environments, minimizing maintenance and replacement costs.
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies, enhancing joint integrity.
• High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread form and drive integrity through repeated use.
• 5/8" hex drive design allows for high torque application with standard tools, facilitating efficient installation and removal.
• Partially threaded shank enables precise clamping force control, ideal for applications where unthreaded grip length is required.
• Compliance with ASTM A574 guarantees consistent quality and mechanical properties, ensuring interoperability with standardized components.

Professional Applications & Engineering Value

Engineered for demanding environments, this 3/4"-10 UNC Socket Head Cap Screw delivers robust fastening solutions where reliability is non-negotiable. The black-oxide alloy steel construction combats corrosion while the coarse UNC thread facilitates quick assembly in structural steel, heavy machinery, and automotive systems. Its partially threaded design prevents thread damage in through-holes and allows for accurate preload distribution. With a 170,000 psi tensile strength and Rockwell C37 hardness, it withstands dynamic loads and vibration, making it ideal for high-stress applications like industrial presses, construction equipment, and transportation frameworks where failure is not an option.

Specification Summary & Compliance

This socket head cap screw features a 3/4"-10 UNC coarse thread with Class 3A fit for precision threading, a minimum thread length of 2", and overall length of 5 1/4". Manufactured in compliance with ASTM A574 specifications, it meets rigorous mechanical standards. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring adherence to environmental and safety regulations for global industrial use.