S-91571A445 1"-8 x 2 3/4" 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 structural integrity with Grade A325 certification and 120,000 psi tensile strength for reliable performance in heavy-load applications
- Superior wear resistance due to Rockwell C19 hardness, extending service life in demanding industrial environments
- Optimized fastening efficiency through 1"-8 UNC coarse threading and Class 2A thread fit, ensuring secure installation and vibration resistance
- Versatile partial threading design providing 1" grip length for precise clamping force distribution in structural connections
- Robust external hex drive with 1 5/8" head width enabling high-torque application with standard tools
- Full regulatory compliance with RoHS 3 and REACH environmental standards for global industrial use
- Proven standardization meeting ASME B18.2.6, ASTM A325, and ASTM F3125 specifications for consistent quality and interchangeability
Professional Applications & Engineering Value
Engineered for structural steel connections and heavy machinery assembly, these Grade A325 hex head screws address critical challenges in industrial fastening. The high-strength steel construction combined with 1"-8 UNC coarse threading delivers superior resistance to dynamic loading and vibration fatigue, preventing joint failure in construction and manufacturing applications. The partially threaded design concentrates clamping force precisely where needed, while the external hex drive accommodates high installation torque without stripping. Meeting ASME B18.2.6 and ASTM A325 specifications, these screws provide certified reliability for structural bolting, bridge construction, and industrial equipment where failure is not an option.
Specification Summary & Compliance
This Grade A325 hex head screw features precise Class 2A thread fit with 1"-8 UNC coarse threading and 2 3/4" overall length. Manufactured to ASME B18.2.6, ASTM A325, and ASTM F3125 standards, ensuring dimensional accuracy and mechanical properties. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for safe industrial use worldwide.
