S-91251A382 5/16"-24 x 7/8" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating, extending service life in harsh industrial environments.
• Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress conditions, reducing failure risks.
• Precise Class 3A fine thread fit provides secure, vibration-resistant fastening for critical assemblies.
• Fully threaded design offers consistent engagement along the entire length, enhancing load distribution.
• 1/4" hex drive socket head allows for easy installation with standard tools, minimizing assembly time.
• Rockwell C37 hardness delivers excellent wear resistance, maintaining integrity through repeated use.
• Compliance with ASTM A574, RoHS 3, and REACH ensures material quality and environmental safety for global applications.

Professional Applications & Engineering Value

This 5/16"-24 UNF socket head cap screw is engineered to address common industrial challenges such as vibration loosening and material fatigue. The black-oxide alloy steel construction provides a durable barrier against rust and corrosion, making it ideal for machinery, automotive, and heavy equipment applications where exposure to moisture or chemicals is a concern. The fine thread spacing and Class 3A thread fit ensure tight, secure connections that resist back-off under dynamic loads, while the fully threaded rod type allows for adjustable clamping force. These features combine to deliver reliable fastening solutions that enhance assembly longevity and reduce maintenance needs in demanding environments.

Specification Summary & Compliance

This socket head cap screw features a 5/16"-24 UNF thread size with Class 3A thread fit for high precision, and is manufactured to ASTM A574 specifications for consistent quality. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met for industrial use.