S-91465A191 1/2"-13 x 6" ASTM A307 Square Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength with 60,000 PSI rating ensures reliable performance under heavy loads and reduces risk of fastener failure
• ASTM A307 Grade A certification guarantees consistent quality and mechanical properties for industrial applications
• External square drive design provides superior torque transmission and prevents tool slippage during installation
• Coarse UNC threading enables faster installation and better performance in softer materials or where vibration is present
• Partial threading configuration offers optimal grip strength while allowing for precise clamping force distribution
• Rockwell B69 hardness provides excellent wear resistance and maintains thread integrity through multiple installations
• RoHS 3 compliance ensures environmental responsibility while meeting international regulatory standards

Professional Applications & Engineering Value

This 1/2"-13 UNC square head screw delivers critical engineering advantages for heavy-duty industrial applications where reliability is paramount. The steel construction combined with ASTM A307 Grade A specifications ensures consistent performance in structural connections, machinery assembly, and construction projects. The external square drive provides superior torque transmission compared to conventional fasteners, reducing installation time and preventing tool damage. With coarse UNC threading and partial threading design, this fastener excels in applications requiring vibration resistance and rapid assembly, while the 6" length accommodates substantial material thicknesses. The combination of 60,000 PSI tensile strength and Rockwell B69 hardness creates a durable solution that withstands demanding environmental conditions and repeated stress cycles.

Specification Summary & Compliance

This square head screw features Unified Standard Class 2A thread fit for consistent engagement and proper clearance. Manufactured to ASTM A307 specifications with Grade A classification, ensuring mechanical properties meet industrial standards. The fastener maintains RoHS 3 (2015/863/EU) compliance for environmental safety and incorporates 1/2"-13 UNC coarse threading with right-hand thread direction. The inch system measurement provides precise dimensional control, while the partially threaded design offers optimized performance for specific clamping requirements.