S-94705A784 7/8"-9 x 5 1/2" ASTM A193 Steel Heavy Hex Head Screws for High-Pressure Applications
Steel Heavy Hex Head Screws for High-Pressure Applications
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional tensile strength of 125,000 psi ensures reliable performance under extreme mechanical stress, reducing failure risks in critical applications.
- High hardness rating (Rockwell C35) provides superior resistance to wear and deformation, extending service life in demanding environments.
- Class 2A thread fit with UNC coarse threading offers easy assembly and secure fastening, minimizing cross-threading and installation errors.
- Partially threaded design allows for precise clamping force distribution, ideal for applications requiring controlled grip length (3 1/4").
- External hex drive with a large 1 7/16" head width enables high-torque installation using standard tools, improving efficiency in maintenance and assembly.
- ASTM A193 Grade B7 compliance guarantees material integrity and performance consistency for high-temperature and pressure applications.
- Robust steel construction ensures durability and corrosion resistance, suitable for heavy-duty industrial and construction uses.
Professional Applications & Engineering Value
Engineered for high-stress industrial systems, these Grade B7 steel hex head screws address critical challenges in machinery, pressure vessels, and structural assemblies. The partially threaded UNC coarse thread design prevents loosening under vibration, while the external hex drive facilitates quick installation in confined spaces. With a 125,000 psi tensile strength and Rockwell C35 hardness, they withstand cyclic loading and harsh conditions, reducing maintenance downtime. Ideal for petrochemical, power generation, and heavy equipment sectors, these ASTM A193-compliant fasteners deliver reliable clamping force and long-term operational safety.
Specification Summary & Compliance
This screw adheres to Class 2A thread fit tolerances and UNC coarse thread standards (7/8"-9), ensuring dimensional accuracy. It meets ASTM A193 Grade B7 specifications for material composition and mechanical properties, with verified tensile strength (125,000 psi) and hardness. The product complies with industry regulations for high-strength fasteners, including RoHS and REACH environmental directives, supporting safe and sustainable usage in global industrial supply chains.
