S-94705A755 5/8"-11 x 6 1/4" ASTM A193 Steel Heavy Hex Head Screws for High-Pressure Applications

Key Features & Benefits at a Glance

• Exceptional tensile strength of 125,000 psi ensures reliable performance under extreme mechanical loads, reducing the risk of fastener failure.
• High hardness rating (Rockwell C35) provides superior resistance to wear and deformation, extending service life in abrasive environments.
• Partially threaded design offers optimal grip and clamping force control, ideal for applications requiring precise joint integrity.
• Class 2A thread fit guarantees smooth assembly and interchangeability, minimizing installation time and production delays.
• ASTM A193 Grade B7 compliance assures material quality and performance consistency for high-temperature and high-pressure applications.
• Coarse UNC threads enable quick assembly and better resistance to vibration loosening in heavy machinery.
• External hex drive with 1 1/16" head width allows for high-torque installation using standard tools, enhancing workplace efficiency.

Professional Applications & Engineering Value

This Grade B7 steel hex head screw is engineered to address critical challenges in industrial and construction settings, where high tensile strength and thermal stability are paramount. The partially threaded configuration provides a secure grip length of 4 1/2", effectively distributing stress and preventing joint slippage in structural assemblies. Made from ASTM A193 compliant steel, it withstands corrosive and high-pressure environments, such as in petrochemical, power generation, and heavy equipment manufacturing. The coarse 5/8"-11 UNC thread ensures rapid installation and robust performance under dynamic loads, while the external hex drive facilitates easy maintenance and disassembly. This combination of material integrity and precise thread fit (Class 2A) minimizes downtime and enhances operational safety in demanding applications.

Specification Summary & Compliance

This fastener adheres to inch system measurements with a thread size of 5/8"-11 UNC and a Class 2A thread fit for consistent dimensional accuracy. It meets ASTM A193 specifications for Grade B7, ensuring compliance with industry standards for high-strength applications. The screw features a right-hand thread direction, coarse thread spacing, and a total length of 6 1/4", with threading partially applied. It conforms to material and manufacturing requirements, supporting reliability in industrial and engineering projects without additional RoHS or REACH declarations specified.