S-91236A725 1/2"-13 x 3 1/4" ASME B18.2.1, ASTM A307 Low-Strength Steel Hex Head Screws
Low-Strength Steel Hex Head Screws
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 - 60,000 psi tensile strength ensures reliable performance in demanding applications, reducing the risk of fastener failure.
- Superior Corrosion Resistance - Zinc plating provides a durable protective layer, extending service life in various industrial environments.
- Optimized Thread Engagement - UNC coarse threading and Class 2A thread fit enable quick assembly and secure fastening, minimizing installation time.
- Enhanced Durability - Rockwell B69 hardness offers excellent resistance to wear and deformation under stress.
- Industry-Standard Compliance - Manufactured to ASME B18.2.1 and ASTM A307 specifications, ensuring consistent quality and interchangeability.
- Secure External Hex Drive - 3/4" head width allows for high-torque application with standard tools, preventing stripping and ensuring tight fastening.
- Environmental Responsibility - RoHS 3 and REACH compliance meets strict regulatory standards for hazardous substances.
Professional Applications & Engineering Value
This 1/2"-13 UNC hex head screw delivers critical engineering solutions for heavy-duty applications where vibration resistance and structural integrity are paramount. The partially threaded design concentrates strength where needed most, while the coarse UNC thread form provides superior grip in softer materials and faster installation. The zinc plated steel construction combats corrosion in manufacturing facilities, construction projects, and machinery assembly. With its external hex drive and substantial head dimensions, it withstands high torque requirements without deformation, making it ideal for structural connections, equipment frames, and industrial maintenance where Class 2A thread fit ensures precise engagement and reliable performance cycle after cycle.
Specification Summary & Compliance
This fastener maintains Class 2A thread fit tolerance for consistent engagement and meets UNC coarse thread standards with 1/2"-13 threading. Manufacturing complies with ASME B18.2.1 dimensional requirements and ASTM A307 material specifications. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to current environmental regulations for hazardous substances.
