S-91571A304 3/4"-10 x 3 1/2" 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 reliability with Grade A325 certification and 120,000 PSI tensile strength for critical load-bearing applications
- Superior clamping force achieved through the partially threaded design and 2 1/8" grip length, minimizing joint slippage
- High durability and wear resistance from Rockwell C19 hardness, ensuring long service life in demanding environments
- Easy installation and removal with external hex drive and 1 1/4" head width, compatible with standard tools
- Precise thread engagement with UNC coarse threads and Class 2A fit, reducing cross-threading risks
- Compliance with major industry standards including ASME B18.2.6, ASTM A325, and ASTM F3125 for guaranteed performance
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting global regulatory requirements
Professional Applications & Engineering Value
This Grade A325 heavy-duty hex head screw is engineered to address critical challenges in structural steel connections, bridge construction, and heavy machinery assembly. The partially threaded design concentrates stress away from the threaded portion, enhancing fatigue resistance in dynamic loads. Made from high-strength steel and featuring UNC coarse threads, it ensures rapid installation and reliable performance in high-vibration environments. The external hex drive and substantial head dimensions provide superior torque transmission, preventing stripping during tightening. Ideal for applications requiring 120,000 PSI tensile strength, this bolt delivers consistent clamping force where structural integrity is non-negotiable, supported by its compliance with ASME B18.2.6 and ASTM A325 specifications.
Specification Summary & Compliance
This 3/4"-10 hex head screw features precise Class 2A thread fit and UNC coarse threading for consistent engagement. Manufacturing adheres to ASME B18.2.6, ASTM A325, and ASTM F3125 standards, ensuring dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its suitability for global industrial use without hazardous substances.
