S-91247A861 3/4"-10 x 7" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 PSI ensures reliable performance in heavy-duty applications, reducing the risk of fastener failure under high stress.
• Zinc plating provides superior corrosion resistance, extending the screw's service life in harsh industrial environments and minimizing maintenance needs.
• Grade 5 classification and Rockwell C25 hardness offer a robust balance of strength and durability, ideal for demanding mechanical assemblies.
• Coarse UNC threading with Class 2A fit allows for quick, secure installation and easy disassembly, improving assembly efficiency and reducing labor time.
• Partially threaded design concentrates strength where needed, providing enhanced clamping force and vibration resistance in structural connections.
• External hex drive and standard head dimensions ensure compatibility with common tools, facilitating straightforward installation and removal.
• Compliance with ASME B18.2.1, RoHS 3, and REACH guarantees adherence to industry standards and environmental regulations, ensuring safety and reliability.

Professional Applications & Engineering Value

This Grade 5 hex head screw is engineered to address critical challenges in industrial fastening, such as vibration loosening and corrosion-induced degradation. The zinc-plated steel construction provides a protective barrier against moisture and chemicals, making it suitable for outdoor machinery, construction equipment, and automotive assemblies. With its 3/4"-10 UNC coarse thread and Class 2A thread fit, it ensures precise engagement and high clamping force, reducing the need for frequent retightening in dynamic load conditions. The partially threaded shank design focuses strength on the engaged section, enhancing resistance to shear and tensile stresses. Ideal for structural frameworks, heavy machinery, and transportation systems, this screw delivers consistent performance where reliability and compliance with ASME B18.2.1 standards are paramount.

Specification Summary & Compliance

This screw features a 3/4"-10 UNC coarse thread with Class 2A tolerance for precise fit and ease of assembly. It meets ASME B18.2.1 and SAE J429 specifications, ensuring dimensional accuracy and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in various industrial applications without hazardous substances.