S-91465A215 5/8"-11 x 3" ASTM A307 Square Head Screws

Key Features & Benefits at a Glance

• High tensile strength of 60,000 PSI ensures reliable performance in demanding applications
• ASTM Grade A steel construction provides excellent durability and corrosion resistance
• External square drive head offers superior torque transmission and prevents stripping
• Unified Standard Class 2A thread fit guarantees precise mating with nuts and threaded holes
• Coarse UNC threading enables faster installation and better performance in softer materials
• Partial threading design provides optimal clamping force distribution
• RoHS 3 compliance ensures environmental safety and regulatory adherence

Professional Applications & Engineering Value

This 5/8"-11 UNC Grade A steel square head screw delivers exceptional engineering value in heavy-duty applications where reliability is paramount. The ASTM A307 compliant construction combined with 60,000 PSI tensile strength and Rockwell B69 hardness ensures superior performance in construction, industrial machinery, and structural applications. The external square drive design prevents cam-out during high-torque installation, while the coarse UNC threading provides excellent grip in wood, metal, and composite materials. The partially threaded configuration allows for precise clamping force distribution, making it ideal for applications requiring vibration resistance and long-term structural integrity.

Specification Summary & Compliance

This square head screw features 5/8"-11 UNC coarse threading with Unified Standard Class 2A thread fit for precise dimensional accuracy. The fastener meets ASTM A307 specifications for low carbon steel external threaded fasteners and is RoHS 3 (2015/863/EU) compliant. With a 3" length and 1½" minimum thread length, the screw maintains consistent performance across industrial applications while adhering to international quality and environmental standards.