S-91236A932 1"-8 x 8" ASME B18.2.1, ASTM A307 Low-Strength Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 60,000 PSI ensures reliable performance under heavy loads, reducing the risk of fastener failure in demanding applications.
• Zinc plated finish provides superior corrosion resistance, extending the service life of the screw in harsh industrial environments.
• Partially threaded design allows for precise clamping force and secure fastening, ideal for applications where unthreaded shank strength is critical.
• Coarse UNC threads enable quicker installation and better performance in materials like cast iron or soft metals, saving assembly time.
• Class 2A thread fit offers consistent, reliable engagement with standard nuts, minimizing cross-threading and ensuring smooth assembly.
• External hex drive and hex head provide high torque capability and easy installation with common tools, enhancing efficiency in maintenance and construction.
• Compliance with ASME B18.2.1 and ASTM A307 guarantees adherence to industry standards, ensuring interoperability and safety in mechanical systems.

Professional Applications & Engineering Value

This 1"-8 UNC partially threaded hex head screw is engineered to address critical fastening challenges in heavy-duty industrial settings. The steel material with Rockwell B69 hardness provides excellent durability, resisting deformation under stress, while the zinc plated finish combats corrosion in outdoor or humid conditions, reducing maintenance needs. Its coarse thread and partial threading design make it ideal for structural applications, such as machinery assembly, construction frameworks, and bridge components, where vibration resistance and reliable grip are paramount. By meeting ASME B18.2.1 and ASTM A307 specifications, it ensures consistent performance, minimizing downtime and enhancing safety in industrial fastening solutions.

Specification Summary & Compliance

This screw features precise Class 2A thread fit per UNC standards, ensuring dimensional accuracy for reliable mating with nuts. It adheres to ASME B18.2.1 and ASTM A307 manufacturing specifications, covering material and mechanical properties. Additionally, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental safety and suitability for global industrial use.