S-94705A832 1 1/4"-8 x 3 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 in high-stress applications, reducing the risk of fastener failure.
- High-temperature and pressure resistance due to ASTM A193 Grade B7 steel construction, ideal for demanding industrial environments.
- Precise Class 2A thread fit provides smooth assembly and secure fastening, minimizing play and vibration loosening.
- Fully threaded design offers maximum grip and load distribution along the entire 3 1/2" length for enhanced joint integrity.
- Rockwell C35 hardness delivers superior wear resistance and durability, extending service life under harsh conditions.
- External hex drive with 2" head width allows for easy installation and high torque application using standard tools.
- UN fine thread (1 1/4"-8) ensures tight clamping force and improved resistance to loosening in dynamic loads.
Professional Applications & Engineering Value
This Grade B7 steel hex head screw is engineered to address critical challenges in high-temperature and high-pressure environments, such as petrochemical, power generation, and heavy machinery applications. Its fully threaded 1 1/4"-8 fine UN threads with Class 2A fit provide precise alignment and consistent clamping force, reducing the risk of leakage or joint failure. The ASTM A193 compliant material ensures stability under thermal cycling and corrosive conditions, making it a reliable choice for industrial fasteners where safety and performance are paramount. By combining high tensile strength and Rockwell C35 hardness, it minimizes maintenance needs and downtime in demanding operations.
Specification Summary & Compliance
This fastener adheres to inch system measurements with a Class 2A thread fit for precise tolerance, UN fine thread type (1 1/4"-8), and full threading over the 3 1/2" length. It complies with ASTM A193 specifications for material and performance, ensuring reliability in high-stress applications. The external hex drive and steel construction meet industry standards for heavy-duty use, with no specified RoHS or REACH deviations noted in the provided data.
