S-91084A130 ASTM A108 Inch-to-Metric Female Hex Thread Adapters

Key Features & Benefits at a Glance

• Seamless Inch-to-Metric Conversion – Enables reliable connection between 8-32 (inch) and M6 (metric) threaded components, eliminating compatibility issues in mixed-standard assemblies.
• Exceptional Strength & Durability – Manufactured from Black-Oxide Steel with a 78,000 psi tensile strength and Rockwell B85 hardness to withstand high-torque applications and resist wear.
• Precision Thread Fits – Features Class 2B (inch) and Class 6H (metric) thread tolerances for consistent, vibration-resistant connections without cross-threading.
• Convenient External Hex Drive – The 1/2" hex drive and 2 1/2" hex length provide ample tool engagement for quick installation and removal with standard wrenches.
• Corrosion-Resistant Finish – The black-oxide surface treatment offers improved resistance to rust and oxidation, extending service life in demanding environments.
• Regulatory Compliance & Quality Assurance – Meets ASTM A108 specifications and is RoHS 3 compliant, ensuring material consistency and environmental safety.
• Optimized Thread Engagement – With thread lengths of 0.437" (inch) and 16 mm (metric), the adapter maintains secure hold in both thread systems under dynamic loads.

Professional Applications & Engineering Value

This female hex thread adapter solves critical challenges in industries where inch and metric systems intersect, such as automotive manufacturing, machinery repair, and industrial equipment assembly. Its Black-Oxide Steel construction and Rockwell B85 hardness provide the necessary durability to handle repeated torque cycles and mechanical stress without deformation. The Class 2B and 6H thread fits ensure precise alignment, reducing the risk of thread damage and improving joint integrity in high-vibration settings. By offering a reliable thread conversion solution with a 1/2" external hex drive, it streamlines maintenance and reduces inventory needs for dual-standard operations, enhancing overall assembly efficiency.

Specification Summary & Compliance

The adapter adheres to Class 2B (inch) and Class 6H (metric) thread tolerances for dimensional accuracy. It is manufactured in compliance with ASTM A108 standards and is RoHS 3 (2015/863/EU) compliant under exemption 6(a)-I for lead as an alloying element in steel, ensuring it meets international environmental and performance criteria for industrial use.