S-91082A101 ASTM A108, ASTM B633 Inch-to-Metric Female Hex Thread Adapters

Key Features & Benefits at a Glance

• Seamless Inch-to-Metric Conversion: Enables reliable connections between 2-56 (inch) and M2.5 (metric) threaded components, eliminating compatibility issues in mixed-standard assemblies.
• Exceptional Mechanical Strength: With a tensile strength of 78,000 psi, this adapter withstands high-stress applications, reducing the risk of failure and ensuring long-term joint integrity.
• Superior Corrosion Resistance: The zinc-plated steel construction provides a durable protective barrier, extending service life in demanding industrial environments.
• Precision Thread Fit: Class 2B (inch) and Class 6H (metric) thread fits guarantee accurate, secure engagement, minimizing cross-threading and improving assembly reliability.
• Optimized for High-Torque Applications: The external hex drive with a 3/16" hex size and 1" length offers excellent tool grip, facilitating easy installation and removal with standard wrenches.
• Enhanced Durability: A Rockwell B85 hardness rating ensures the adapter resists wear and deformation, maintaining performance through repeated use.
• Broad Industrial Compliance: Meets ASTM A108 and ASTM B633 specifications, assuring material quality and manufacturing consistency for professional applications.

Professional Applications & Engineering Value

This female hex thread adapter is engineered to solve critical challenges in environments utilizing both inch and metric fastener systems. Its zinc-plated steel construction and Class 2B/6H thread fit provide a robust, corrosion-resistant solution that prevents thread galling and ensures consistent clamping force. The external hex drive design allows for high-torque installation, making it ideal for precision assembly in electronics, automotive, and machinery sectors where space constraints and mixed-thread standards are common. By enabling seamless transitions between 2-56 and M2.5 threads, it reduces inventory needs for multiple adapters and minimizes assembly errors, enhancing overall operational efficiency and equipment reliability.

Specification Summary & Compliance

This adapter features precise Class 2B (inch) and Class 6H (metric) thread tolerances, ensuring dimensional accuracy and reliable performance. It is manufactured in compliance with ASTM A108 and ASTM B633 standards for material and plating quality. The product is RoHS 3 (2015/863/EU) compliant under exemption 6(a)-I, confirming its suitability for use in regulated industries without hazardous substance concerns.