S-94705A851 1 1/4"-8 x 8" 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 in high-stress industrial applications, reducing failure risks.
• ASTM Grade B7 steel construction provides superior durability and resistance to deformation under heavy loads.
• Rockwell C35 hardness offers excellent wear resistance, extending service life in demanding environments.
• Partially threaded design with 5" grip length allows for secure clamping in thick materials, minimizing vibration loosening.
• Class 2A thread fit and UN fine threads deliver precise engagement and smooth installation, enhancing assembly efficiency.
• 2" hex head with external drive enables easy torque application using standard tools, speeding up maintenance and installation.
• Compliance with ASTM A193 specifications guarantees consistent quality and suitability for high-temperature and pressure applications.

Professional Applications & Engineering Value

This 1 1/4"-8 hex head screw is engineered from ASTM Grade B7 steel to address critical challenges in heavy-duty industries, such as construction, oil and gas, and machinery assembly. The partially threaded configuration with a 5" grip length ensures stable fastening in thick components, preventing joint slippage under dynamic loads. Featuring UN fine threads and a right-hand thread direction, it provides superior resistance to vibration and thermal cycling, common in industrial settings. The external hex drive and large 2" head width facilitate quick installation with standard wrenches, reducing labor time. With a Rockwell C35 hardness and high tensile strength, it excels in environments requiring corrosion resistance and long-term reliability, making it ideal for structural supports, pressure vessels, and high-stress mechanical systems.

Specification Summary & Compliance

This fastener adheres to Class 2A thread fit tolerances for precise engagement and is manufactured in accordance with ASTM A193 specifications. It features UN fine threads with a size of 1 1/4"-8, ensuring compatibility with standard nuts and components. The product meets industry standards for high-strength applications, with compliance to relevant regulations such as RoHS and REACH for environmental safety, supporting use in global industrial markets.