S-91255A845 3/8"-24 x 3" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with black-oxide coating, ideal for harsh industrial environments and extending service life.
• Superior tensile strength of 120,000 psi ensures reliable performance under high-stress conditions, preventing fastener failure.
• Precise Class 3A fine threading provides a tighter, more secure fit with reduced risk of vibration loosening in critical assemblies.
• High Rockwell C39 hardness offers excellent wear resistance and durability for long-term, heavy-duty applications.
• Convenient 7/32" hex drive allows for easy installation and removal with standard tools, improving assembly efficiency.
• Fully threaded 3-inch length maximizes grip and clamping force across the entire fastener for enhanced joint integrity.
• Compliance with major industry standards including ASME B18.3 and ASTM F835, guaranteeing quality and interchangeability.

Professional Applications & Engineering Value

This Black-Oxide Alloy Steel Rounded Head Screw is engineered to address common industrial challenges such as vibration-induced loosening and environmental corrosion. The 3/8"-24 UNF fine thread and Class 3A fit create a secure, leak-resistant connection, making it ideal for precision machinery, automotive assemblies, and heavy equipment where reliability is paramount. The button head style provides a low-profile finish, reducing snag risks in confined spaces. Its high tensile strength and robust alloy steel construction ensure it can withstand dynamic loads and harsh operating conditions, delivering long-term performance and reducing maintenance frequency in demanding industrial applications.

Specification Summary & Compliance

This screw features 3/8"-24 UNF fine threads with a precision Class 3A thread fit for superior engagement. It is manufactured in accordance with ASME B18.3 and ASTM F835 specifications, ensuring dimensional accuracy and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in environmentally conscious and regulated industries.