S-94705A729 1/2"-13 x 3 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 applications, reducing the risk of fastener failure.
• Grade B7 steel construction provides superior durability and resistance to deformation under heavy loads, extending service life.
• Partially threaded design offers optimal grip length for secure fastening in structural and industrial assemblies.
• Class 2A thread fit with UNC coarse threads enables quick, easy installation and removal while maintaining precision alignment.
• External hex drive and hex head allow for high-torque application with standard tools, improving assembly efficiency.
• Rockwell C35 hardness enhances wear resistance and maintains integrity in demanding environments.
• Full ASTM A193 compliance guarantees material quality and performance consistency for critical engineering applications.

Professional Applications & Engineering Value

This 1/2"-13 UNC Grade B7 steel hex head screw is engineered to address critical challenges in heavy-duty industrial settings, such as pressure vessel systems, construction frameworks, and high-temperature equipment. The partially threaded configuration with a substantial grip length ensures stable clamping force distribution, minimizing loosening under vibration or dynamic loads. Made from ASTM A193-compliant steel, it withstands extreme mechanical stress and corrosive conditions, offering long-term reliability. The coarse UNC threads and external hex drive facilitate rapid installation with common wrenches, reducing labor time while maintaining 125,000 psi tensile strength for safety-critical connections. Ideal for engineers requiring robust, code-compliant fasteners that enhance assembly integrity and reduce maintenance costs.

Specification Summary & Compliance

This fastener adheres to precise dimensional standards, including Class 2A thread fit for consistent engagement and UNC coarse threading (1/2"-13) per inch system requirements. It meets ASTM A193 specifications for material composition and performance, ensuring compatibility with high-pressure and high-temperature applications. Compliant with industry regulations for quality and safety, it supports reliable use in construction, manufacturing, and engineering projects where Grade B7 strength and durability are essential.