S-91251A137 5/8"-11 x 12" 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 applications, reducing the risk of fastener failure.
• Superior corrosion resistance from the black-oxide finish on alloy steel, extending service life in demanding industrial environments.
• Precise Class 3A thread fit provides tight tolerances for secure, vibration-resistant assemblies, minimizing loosening over time.
• Efficient torque transmission with a 1/2" hex drive and standard socket head profile, allowing for easy installation in confined spaces.
• Robust Rockwell C37 hardness offers excellent wear resistance, maintaining thread integrity through repeated use.
• Versatile coarse UNRC thread design enables quick assembly and disassembly, saving time in maintenance and production cycles.
• Compliance with environmental regulations including RoHS 3 and REACH, ensuring safe use in global industrial supply chains.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these Black-Oxide Alloy Steel Socket Head Cap Screws address critical challenges in machinery, construction, and automotive sectors. The 5/8"-11 coarse thread with Class 3A fit ensures rapid, secure fastening in high-vibration environments, reducing assembly time and maintenance costs. The partially threaded design with a minimum thread length of 1 3/4" provides optimal grip in thick materials, while the alloy steel construction and black-oxide surface treatment resist corrosion and wear, extending component lifespan. Ideal for industrial fastening solutions requiring high tensile strength and reliability, these screws deliver consistent performance under extreme loads, supported by ASTM A574 specifications for quality assurance.

Specification Summary & Compliance

This product adheres to Class 3A thread fit for precise dimensional accuracy and UNRC coarse thread standards with a right-hand thread direction. Manufactured in compliance with ASTM A574 for material and performance consistency, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance in industrial markets.