S-91251A341 3/8"-16 x 8 1/2" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance under heavy loads and prevents failure in demanding applications.
• Superior corrosion resistance from the black-oxide finish on alloy steel, extending service life in harsh industrial environments.
• Precise Class 3A thread fit guarantees secure, vibration-resistant connections and reduces the risk of loosening.
• Hex socket drive design allows for high-torque installation and removal in confined spaces, improving assembly efficiency.
• Partially threaded shank provides optimal clamping force and prevents thread damage during repeated use.
• Coarse UNC threads enable quick assembly and disassembly, saving time in maintenance and production cycles.
• Full compliance with ASTM A574 ensures consistent quality and mechanical properties for engineering-critical applications.

Professional Applications & Engineering Value

This Socket Head Cap Screw is engineered to address common industrial challenges such as joint failure, corrosion, and assembly inefficiency. The black-oxide alloy steel construction offers enhanced durability and resistance to environmental factors, making it ideal for heavy machinery, automotive assemblies, and structural frameworks. The 3/8"-16 UNC coarse thread with a Class 3A fit ensures tight, reliable fastening that withstands vibrations and dynamic loads. Its partially threaded design concentrates clamping force precisely where needed, reducing stress concentration and improving joint integrity. These features make it a top choice for engineers seeking high-strength, long-lasting industrial fasteners that minimize downtime and maintenance costs.

Specification Summary & Compliance

This screw features a 3/8"-16 UNC coarse thread with a Class 3A thread fit for high precision. It is manufactured in accordance with ASTM A574 specifications, ensuring consistent mechanical properties and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental responsibility for global industrial use.