S-94705A841 1 1/4"-8 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 in high-stress industrial and construction applications
- Premium ASTM Grade B7 steel construction delivers superior durability and resistance to mechanical stress
- Rockwell C35 hardness rating provides excellent wear resistance and long-term fastener integrity
- Partially threaded design offers optimal grip strength and vibration resistance in critical connections
- UN fine thread with Class 2A fit ensures precise engagement and consistent clamping force
- 2" external hex head allows for easy installation with standard tools while preventing rounding
- ASTM A193 compliance guarantees material quality and performance for pressure-containing applications
Professional Applications & Engineering Value
This high-strength hex head screw is engineered to solve critical fastening challenges in demanding environments. The ASTM Grade B7 steel construction combined with 125,000 PSI tensile strength makes it ideal for pressure vessel applications, structural steel connections, and heavy machinery where failure is not an option. The partially threaded design concentrates thread engagement where it's needed most, providing superior clamping force while reducing stress concentration. The UN fine thread pattern offers better vibration resistance compared to coarse threads, making these industrial hex screws perfect for applications subject to dynamic loads or thermal cycling. With its 2-inch hex head and external drive style, installation and maintenance are streamlined using standard tools, reducing downtime in construction and manufacturing settings.
Specification Summary & Compliance
This heavy-duty fastener features precise Class 2A thread fit tolerances with 1 1/4"-8 UN fine threads and right-hand thread direction. The manufacturing complies with ASTM A193 specifications for high-temperature service applications. The screw measures 5 1/2" in total length with 2 3/4" thread length and 2 3/4" grip length, providing optimal engagement for various material thicknesses. The inch system measurement ensures compatibility with North American industrial standards and equipment.
