S-94705A326 5/8"-11 x 4" 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 loads
- High-temperature resistance from ASTM A193 Grade B7 steel construction for demanding industrial environments
- Superior clamping force achieved through optimized 2½" grip length and partial threading design
- Precise Class 2A thread fit provides smooth assembly and consistent torque performance
- Rockwell C35 hardness delivers excellent wear resistance and long-term durability
- External hex drive design enables easy installation with standard tools in confined spaces
- Coarse UNC threading ensures rapid assembly and reduced cross-threading risks
Professional Applications & Engineering Value
This Grade B7 steel hex head screw is engineered to solve critical challenges in high-pressure and high-temperature applications across industrial sectors. The ASTM A193 specification ensures consistent performance in demanding environments such as pressure vessels, valve systems, and heavy machinery where thermal cycling and mechanical stress are constant concerns. The partially threaded design with precise 1½" thread length and 2½" grip length creates optimal stress distribution, preventing joint relaxation under vibration. The coarse UNC thread form combined with Class 2A tolerance facilitates quick assembly while maintaining structural integrity, making it ideal for maintenance operations where downtime reduction is critical. The external hex drive and substantial 1 1/16" head width provide superior torque transmission for secure fastening in challenging access conditions.
Specification Summary & Compliance
Manufactured to ASTM A193 Grade B7 specifications with Class 2A thread fit ensuring dimensional accuracy and interchangeability. The 5/8"-11 UNC coarse thread maintains compliance with standardized threading systems while the Rockwell C35 hardness and 125,000 PSI tensile strength exceed typical industrial requirements. This fastener meets critical industry standards for high-temperature service and is suitable for applications requiring reliable performance under sustained mechanical stress.
