S-91247A773 9/16"-12 x 4" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws
Medium-Strength Grade 5 Steel Hex Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Exceptional tensile strength of 120,000 psi ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
- Zinc plated steel construction provides superior corrosion resistance, extending service life in demanding environments.
- Grade 5 classification and Rockwell C25 hardness offer a balance of strength and ductility, preventing brittleness under heavy loads.
- 9/16"-12 UNC coarse threads enable faster installation and better resistance to vibration loosening compared to fine threads.
- External hex drive and hex head design allows for high-torque application with standard tools, improving assembly efficiency.
- Partially threaded shank provides an unthreaded section for precise clamping and shear resistance in structural connections.
- Compliance with ASME B18.2.1, RoHS 3, and REACH ensures consistent quality and environmental safety for global industrial use.
Professional Applications & Engineering Value
This Grade 5 hex head screw is engineered to address critical challenges in heavy machinery, construction, and automotive assemblies where vibration resistance and high tensile strength are paramount. The zinc plated finish on steel material combats corrosion in outdoor or humid conditions, while the coarse UNC threads and external hex drive facilitate quick, secure fastening even in high-vibration environments. With a partially threaded design, it minimizes stress concentration and provides superior clamping force for structural joints, making it ideal for industrial applications requiring durability and compliance with ASME B18.2.1 standards.
Specification Summary & Compliance
This fastener features a 9/16"-12 UNC thread size with Class 2A thread fit for consistent engagement and ISO-compatible inch system dimensions. It meets ASME B18.2.1 manufacturing specifications and SAE J429 Grade 5 strength requirements, ensuring dimensional accuracy and mechanical reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and suitability for global industrial supply chains.
