S-91084A123 ASTM A108 Inch-to-Metric Female Hex Thread Adapters

Key Features & Benefits at a Glance

• Seamless Inch-to-Metric Conversion: Enables reliable connection between 2-56 (inch) and M4 (metric) threaded components, eliminating compatibility issues and reducing assembly time.
• Exceptional Durability & Corrosion Resistance: Constructed from Black-Oxide Steel with a Rockwell B85 hardness rating, offering superior wear resistance and protection in demanding industrial environments.
• High Tensile Strength for Demanding Applications: With a 78,000 psi tensile strength, this adapter withstands high loads and stresses, ensuring a secure, long-lasting connection.
• Precision Thread Fit for Leak-Proof Sealing: Features Class 2B (inch) and Class 6H (metric) thread fits, guaranteeing tight tolerances and minimizing the risk of loosening under vibration.
• Easy Installation with Standard Tools: The 1/4" external hex drive allows for quick and straightforward installation using common wrenches, boosting on-site efficiency.
• Compliance with Industry Standards: Manufactured to meet ASTM A108 specifications and RoHS 3 compliance, ensuring material consistency and environmental safety for global supply chains.

Professional Applications & Engineering Value

This female hex thread adapter is engineered to solve critical challenges in multi-standard assembly lines, where inch and metric thread systems coexist. The Black-Oxide Steel construction provides enhanced corrosion resistance, making it ideal for applications in automotive, aerospace, and heavy machinery that are exposed to oils, moisture, and varying temperatures. Its high tensile strength and precise Class 2B/6H thread fit ensure vibration-resistant connections, reducing maintenance downtime and preventing thread stripping in high-stress environments. By enabling seamless thread conversion from 2-56 to M4, this adapter streamlines inventory management and accelerates production workflows, delivering consistent performance in precision-driven industries.

Specification Summary & Compliance

This adapter meets precise dimensional standards with Class 2B (inch) and Class 6H (metric) thread fits, ensuring accurate engagement and interchangeability. It is manufactured in accordance with ASTM A108 material specifications and is RoHS 3 (2015/863/EU) compliant under exemption 6(a)-I for lead as an alloying element in steel, supporting global regulatory and quality requirements.