S-91465A209 5/8"-11 x 2" ASTM A307 Square Head Screws

Key Features & Benefits at a Glance

• Superior torque transmission with external square drive design for secure installation and removal in demanding applications
• Reliable performance in industrial environments thanks to Grade A steel construction with 60,000 psi tensile strength
• Excellent thread engagement with coarse UNC threading that resists vibration loosening and handles debris better than fine threads
• Consistent dimensional accuracy maintained through Unified Standard Class 2A thread fit for predictable assembly performance
• Optimized material efficiency through partial threading that provides full thread engagement where needed while reducing material costs
• Enhanced durability with Rockwell B69 hardness rating that balances strength with appropriate toughness for industrial use
• Environmental compliance assurance with RoHS 3 compliance for use in regulated industries and global markets

Professional Applications & Engineering Value

This 5/8"-11 UNC square head screw delivers exceptional value in heavy-duty assembly applications where reliable fastening is critical. The Grade A steel construction provides the ideal balance of strength and ductility for structural connections, while the coarse thread design ensures rapid installation and superior performance in materials prone to vibration or thermal cycling. The distinctive square head configuration offers significant advantages in high-torque applications, allowing for secure wrench engagement that minimizes slipping and tool damage. Particularly valuable in construction, machinery assembly, and structural steel work, this partially threaded fastener concentrates thread engagement where needed most, optimizing both performance and cost-efficiency. The external square drive system provides excellent accessibility in confined spaces where socket access may be limited.

Specification Summary & Compliance

This square head screw features precise Unified Standard Class 2A thread fit with 5/8"-11 UNC coarse threading and right-hand thread direction. Manufactured to ASTM A307 specifications for low-strength applications, the fastener delivers 60,000 psi tensile strength with Rockwell B69 hardness. The 2" length provides 1 1/2" minimum thread length in partially threaded configuration. Compliant with RoHS 3 (2015/863/EU) environmental standards for use in regulated industries and international markets.