S-91253A186 8-32 x 3/16" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior Corrosion Resistance: Black-oxide coating on alloy steel provides excellent protection against rust and environmental degradation, extending service life in demanding conditions.
• High Tensile Strength & Durability: With 130,000 psi tensile strength and Rockwell C39 hardness, these screws withstand high stress and repetitive loads without failure.
• Precision Thread Fit: Class 3A thread fit ensures tighter tolerances and reliable, vibration-resistant fastening in critical assemblies.
• Efficient Installation & Flush Finish: Hex drive (3/32") and undercut flat head with 82° countersink angle allow for easy, secure driving and a smooth, flush surface.
• Full Thread Engagement: Fully threaded UNC coarse design provides maximum grip and holding power across the entire fastener length.
• Regulatory Compliance: Meets ASTM F835 specifications and is RoHS 3 and REACH compliant, ensuring safety and environmental standards are upheld.
• Versatile Right-Hand Threading: Standard right-hand coarse threads (8-32 UNC) offer broad compatibility and quick assembly in various industrial setups.

Professional Applications & Engineering Value

Engineered for industrial and mechanical systems, these 8-32 UNC flat head screws address common challenges like vibration loosening and corrosion in harsh environments. The black-oxide alloy steel construction enhances durability while the Class 3A thread fit and fully threaded coarse design ensure secure, long-lasting connections in machinery, automotive, and electronics. The undercut flat head with an 82° countersink angle allows for a seamless finish, reducing snagging and improving aesthetics. Ideal for applications requiring high tensile strength and reliable performance, these screws minimize maintenance and downtime, providing exceptional value in industrial fastening solutions.

Specification Summary & Compliance

This screw features precise dimensions including a 3/16" length, 0.164" thread diameter, and Class 3A thread fit per UNC standards. It complies with ASTM F835 for mechanical properties, RoHS 3 (2015/863/EU) for hazardous substance restrictions, and REACH (EC 1907/2006) for chemical safety, ensuring adherence to industry and environmental regulations.