S-91571A306 3/4"-10 x 4" ASME B18.2.6, ASTM A325, ASTM F3125 Medium-Strength Steel Heavy Hex Head Screws for Structural Applications
Medium-Strength Steel Heavy Hex Head Screws for Structural Applications
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Exceptional load-bearing capacity with 120,000 psi tensile strength for reliable performance in heavy structural applications
- Superior corrosion resistance and durability through high-strength steel construction with Rockwell C19 hardness
- Quick installation and secure fastening with UNC coarse threading and external hex drive design
- Precise thread engagement with Class 2A thread fit ensuring consistent performance in demanding environments
- Optimized grip length of 2 5/8" for enhanced clamping force distribution across joined materials
- Compliance with major industry standards including ASME B18.2.6, ASTM A325, and ASTM F3125 for guaranteed quality
- Environmental regulation compliance with RoHS 3 and REACH for safe use in global industrial markets
Professional Applications & Engineering Value
These Grade A325 hex head screws deliver critical structural integrity for heavy-duty applications where failure is not an option. The high-strength steel construction combined with Rockwell C19 hardness provides exceptional resistance to shear and tensile forces, making them ideal for structural steel connections, bridge construction, and heavy machinery assembly. The UNC coarse threading ensures rapid installation while maintaining vibration resistance, and the partially threaded design concentrates strength where needed most. The external hex drive allows for high-torque installation with standard tools, while the Class 2A thread fit guarantees consistent performance across multiple installations. These industrial-grade fasteners solve critical engineering challenges in construction, infrastructure, and manufacturing sectors where reliability and durability are paramount.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit and UNC coarse threading (3/4"-10 thread size). These hex head screws comply with ASME B18.2.6, ASTM A325, and ASTM F3125 specifications for structural bolts. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring they meet international environmental and safety standards for industrial applications.
