S-94705A842 1 1/4"-8 x 5 3/4" 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 in high-stress industrial environments, reducing the risk of fastener failure.
• ASTM Grade B7 steel construction provides superior durability and resistance to deformation under heavy loads and extreme temperatures.
• Rockwell C35 hardness offers excellent wear resistance, extending the service life of the screw in abrasive conditions.
• Partially threaded design with 3" grip length allows for secure clamping and precise alignment in structural and machinery assemblies.
• Class 2A thread fit and UN fine thread ensure smooth engagement and consistent torque application, minimizing cross-threading risks.
• External hex drive and 2" head width facilitate easy installation and removal with standard tools, improving assembly efficiency.
• Compliance with ASTM A193 specifications guarantees material integrity and performance consistency for critical applications.

Professional Applications & Engineering Value

This 1 1/4"-8 hex head screw is engineered to address demanding industrial challenges where high tensile strength and durability are paramount. Made from ASTM Grade B7 steel, it withstands extreme pressures and temperatures in applications like pressure vessels, valve systems, and heavy machinery. The partially threaded design and UN fine thread provide optimal load distribution and vibration resistance, preventing loosening in dynamic environments. With a Rockwell C35 hardness and external hex drive, it ensures reliable fastening in construction, oil and gas, and manufacturing sectors, reducing maintenance needs and enhancing operational safety.

Specification Summary & Compliance

This screw features precise Class 2A thread fit and inch measurement with a thread size of 1 1/4"-8, ensuring accurate alignment and interchangeability. It adheres to ASTM A193 specifications for material quality and performance, with a tensile strength of 125,000 PSI and hardness of Rockwell C35. The design includes a partially threaded configuration with a 2 3/4" thread length and 3" grip length, meeting industrial standards for reliability. Compliant with common regulations for heavy-duty fasteners, it supports applications requiring consistent mechanical properties and dimensional accuracy.