S-91306A333 8-32 x 1/4" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating that protects against rust in demanding industrial environments
• Exceptional tensile strength of 120,000 psi ensures reliable performance under high-stress applications
• Precise Class 3A thread fit provides tighter tolerances for secure fastening and vibration resistance
• Rockwell C39 hardness maintains structural integrity and prevents stripping during installation
• Full threading design allows maximum engagement depth and consistent clamping force
• Hex drive compatibility with 3/32" tools enables quick installation and removal with standard equipment
• Rounded button head profile offers a low-profile finish while preventing snagging on equipment

Professional Applications & Engineering Value

These 8-32 UNC coarse thread screws with zinc-plated alloy steel construction address critical industrial fastening challenges where corrosion resistance and high tensile strength are paramount. The Class 3A thread fit ensures precise engagement in machinery, electronic enclosures, and automotive assemblies, minimizing the risk of loosening under vibration. The fully threaded design provides consistent load distribution across the entire fastener length, while the rounded button head with hex drive facilitates installation in confined spaces. Engineered for industrial applications requiring reliable performance, these screws maintain integrity in environments where standard fasteners might fail due to stress or environmental exposure.

Specification Summary & Compliance

Manufactured to exacting Class 3A thread fit tolerances with UNC coarse threading (8-32 size) and compliant with ASME B18.3 and ASTM F835 specifications. These zinc-plated alloy steel screws meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards, ensuring they are free from hazardous substances and suitable for global industrial applications.