S-91465A269 3/4"-10 x 8" ASTM A307 Square Head Screws

Key Features & Benefits at a Glance

• Superior torque transmission with external square drive design for secure installation and reduced tool slippage
• Exceptional durability through ASTM Grade A steel construction with 60,000 psi tensile strength for reliable load-bearing performance
• Optimized thread engagement with Unified Standard Class 2A fit ensuring consistent fastening in industrial environments
• Enhanced corrosion resistance with RoHS 3 compliant materials meeting stringent environmental regulations
• Simplified installation through right-hand coarse UNC threading providing faster assembly in heavy-duty applications
• Versatile partial threading allowing both clamping and alignment functions in structural connections
• Consistent hardness profile with Rockwell B69 rating maintaining dimensional stability under stress

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this 3/4"-10 UNC square head screw addresses critical challenges in structural fastening and machinery assembly. The ASTM A307 Grade A steel construction provides optimal strength-to-weight ratio while the external square drive delivers maximum torque transfer without cam-out issues common in Phillips drives. The coarse thread spacing ensures rapid installation in structural steel, timber framing, and equipment bases where vibration resistance is paramount. Partially threaded design allows for both clamping force distribution and alignment capabilities, making it ideal for construction projects requiring both tension and shear strength. The Rockwell B69 hardness maintains thread integrity while the 60,000 psi tensile strength supports substantial static loads in infrastructure and manufacturing environments.

Specification Summary & Compliance

Manufactured to Unified Standard Class 2A thread tolerances with 3/4"-10 UNC coarse threading and 2" minimum thread length. Complies with ASTM A307 specifications for low-strength fasteners and meets RoHS 3 (2015/863/EU) environmental standards. The inch-system dimensional accuracy ensures compatibility with North American industrial equipment and replacement part requirements.