S-91465A260 3/4"-10 x 5 1/2" ASTM A307 Square Head Screws

Key Features & Benefits at a Glance

• Superior torque transmission with external square drive design for secure tool engagement and reduced slipping during high-torque applications
• Reliable load-bearing performance with 60,000 psi tensile strength and ASTM A307 Grade A certification for consistent structural integrity
• Enhanced durability through Rockwell B69 hardness steel construction, resisting deformation under heavy loads
• Quick assembly efficiency with coarse UNC threading and partial threading design for faster installation in industrial settings
• Precise thread compatibility ensured by Unified Standard Class 2A fit, reducing cross-threading risks in inch-system equipment
• Environmental compliance with RoHS 3 (2015/863/EU) standards, making it suitable for regulated industrial and construction projects
• Optimized length-to-strength ratio with 5 1/2" length and 1 3/4" minimum thread length for versatile clamping in heavy-duty connections

Professional Applications & Engineering Value

This 3/4"-10 UNC Square Head Screw addresses critical challenges in heavy-duty industrial applications where vibration resistance and high torque requirements are paramount. The ASTM A307 Grade A steel construction provides a balanced combination of 60,000 psi tensile strength and Rockwell B69 hardness, preventing thread stripping and head deformation under extreme loads. The external square drive design ensures maximum torque transmission without cam-out, while the coarse thread spacing and partial threading enable faster installation in structural steel, construction frameworks, and machinery assembly. The Unified Standard Class 2A thread fit guarantees compatibility with standard nuts and tapped holes, reducing assembly time and improving connection reliability in demanding environments.

Specification Summary & Compliance

This square head screw maintains Unified Standard Class 2A thread fit with precise dimensional accuracy for inch-system applications. Manufacturing complies with ASTM A307 specifications for Grade A fasteners, ensuring consistent mechanical properties and performance. The product meets RoHS 3 (2015/863/EU) compliance requirements, containing no restricted hazardous substances. Thread specifications include 3/4"-10 UNC coarse thread with right-hand direction and partial threading configuration, engineered for reliable performance in industrial fastening systems.