S-91247A528 1"-14 x 3 3/4" 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 provides reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
• Grade 5 steel construction with Rockwell C25 hardness ensures superior durability and resistance to wear, extending service life in demanding environments.
• Zinc plating finish offers excellent corrosion resistance, protecting the screw from rust and environmental degradation.
• 1"-14 extra fine thread with Class 2A fit delivers precise, secure fastening with minimal vibration loosening, ideal for fine-adjustment assemblies.
• Partially threaded design allows for controlled clamping force and easier alignment in structural connections.
• External hex drive and hex head enable quick installation and high torque application with standard tools, improving assembly efficiency.
• Compliance with ASME B18.2.1 and SAE J429 standards guarantees consistent quality, interchangeability, and reliability in mechanical systems.

Professional Applications & Engineering Value

This Grade 5 hex head screw is engineered to address critical challenges in heavy-duty industrial settings, such as machinery assembly, structural frameworks, and automotive components. The extra fine thread (1"-14) and Class 2A thread fit provide superior resistance to vibration-induced loosening, ensuring long-term stability in dynamic environments. Made from high-strength steel with a zinc plated surface, it combats corrosion while maintaining 120,000 psi tensile strength and Rockwell C25 hardness. Its partially threaded configuration allows precise load distribution, reducing stress concentration. Ideal for applications requiring ASME B18.2.1 and SAE J429 compliance, this fastener delivers reliability in construction, manufacturing, and equipment maintenance, minimizing downtime and replacement costs.

Specification Summary & Compliance

This hex head screw features a 1"-14 extra fine thread with Class 2A fit for precise tolerance, adhering to ASME B18.2.1 and SAE J429 standards. It is manufactured from steel with a zinc plated finish, and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity for industrial use.