S-91309A876 7/8"-9 x 1 1/2" ASME B18.2.1, ASTM A307 Low-Strength Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating, extending service life in demanding industrial environments.
• High tensile strength of 60,000 PSI ensures reliable performance under heavy loads and vibration.
• Rockwell B69 hardness provides excellent durability and resistance to wear and deformation.
• Coarse UNC thread and Class 2A fit enable faster assembly and secure fastening in a wide range of materials.
• External hex drive and hex head design allows for high-torque application with standard tools, simplifying installation.
• Full threading along the 1 1/2" length offers maximum grip and adjustability in deep or variable material thicknesses.
• Compliance with ASME B18.2.1, RoHS 3, and REACH guarantees consistent quality, safety, and environmental responsibility.

Professional Applications & Engineering Value

This 7/8"-9 UNC hex head screw is engineered to address critical challenges in industrial applications where strength, reliability, and compliance are non-negotiable. The steel material combined with a zinc-plated finish provides robust protection against rust and corrosion, making it ideal for outdoor machinery, structural assemblies, and heavy equipment exposed to harsh conditions. The coarse thread and Class 2A thread fit ensure quick, secure fastening even in softer materials or where alignment variations occur, reducing installation time and preventing loosening under dynamic loads. With a tensile strength of 60,000 PSI and full threading, it delivers consistent clamping force and vibration resistance, essential for maintaining integrity in construction, automotive, and manufacturing sectors that demand ASME B18.2.1 standards for safety and performance.

Specification Summary & Compliance

This product adheres to precise inch system dimensions, including a thread size of 7/8"-9 UNC with Class 2A thread fit for standardized accuracy and interchangeability. It meets ASME B18.2.1 specifications under ASTM A307, ensuring uniformity in manufacturing and application. Additionally, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming the absence of hazardous substances and supporting sustainable procurement practices.