S-91465A254 3/4"-10 x 4 1/2" ASTM A307 Square Head Screws

Key Features & Benefits at a Glance

• Enhanced torque transmission through the external square drive head, ensuring secure installation in heavy machinery and construction applications
• Superior durability in industrial environments thanks to ASTM Grade A steel construction with Rockwell B69 hardness
• Reliable fastening under moderate loads with a tensile strength rating of 60,000 psi, ideal for structural and mechanical assemblies
• Quick and easy installation facilitated by the coarse UNC thread and right-hand direction, reducing assembly time
• Optimized grip and weight distribution from the partially threaded design, preventing loosening in dynamic applications
• Precise and consistent fit ensured by Unified Standard Class 2A thread tolerance, minimizing the risk of cross-threading
• Safe for regulated industries with full RoHS 3 compliance, meeting environmental and health standards

Professional Applications & Engineering Value

This 3/4"-10 UNC Square Head Screw is engineered to address common challenges in industrial fastening, such as vibration resistance and ease of maintenance. Manufactured from ASTM A307 Grade A steel, it provides a balanced combination of 60,000 psi tensile strength and Rockwell B69 hardness, making it suitable for applications where high impact resistance is not required but consistent performance is critical. The coarse thread and partially threaded shank enhance grip in wood, metal, and composite materials, reducing the risk of stripping in coarse-grained substrates. Its external square drive allows for high-torque application with standard tools, ideal for construction, machinery assembly, and infrastructure projects where reliable, semi-permanent connections are essential. This screw meets the demands of heavy-duty fastening while complying with industry specifications for safety and durability.

Specification Summary & Compliance

This square head screw adheres to Unified Standard Class 2A thread fit, ensuring dimensional accuracy and interchangeability. It conforms to ASTM A307 specifications for low-strength fasteners and is RoHS 3 (2015/863/EU) Compliant, meeting environmental regulations. The product features a 3/4"-10 UNC coarse thread, 4 1/2" length, and partial threading, manufactured in the inch system for compatibility with standard industrial components.