S-91082A110 ASTM A108, ASTM B633 Inch-to-Metric Female Hex Thread Adapters

Key Features & Benefits at a Glance

• Seamless Inch-to-Metric Conversion: Effortlessly connect 8-32 (inch) and M4 (metric) threaded components, eliminating compatibility issues in mixed-standard assemblies.
• Superior Corrosion Resistance: Zinc-plated steel construction provides a durable barrier against rust and environmental degradation, extending service life in harsh conditions.
• High Tensile Strength for Demanding Loads: With a 78,000 psi tensile strength, this adapter reliably handles high-stress applications without failure.
• Optimized for Secure Installation: The 1/4" external hex drive and substantial 1 1/2" hex length offer excellent tool grip and torque transmission, preventing slippage.
• Precision Thread Fit for Leak-Free Connections: Manufactured to Class 2B (inch) and Class 6H (metric) thread fits to ensure tight, secure, and reliable engagements.
• Enhanced Durability and Wear Resistance: A Rockwell B85 hardness rating ensures the adapter maintains its form and thread integrity under repeated use and vibration.
• Guaranteed Quality and Compliance: Meets ASTM A108 and ASTM B633 specifications and is RoHS 3 compliant, ensuring material consistency and environmental safety.

Professional Applications & Engineering Value

This 8-32 to M4 female hex thread adapter is engineered to solve critical challenges in industrial and engineering environments where inch and metric systems intersect. Its zinc-plated steel build combats corrosion, making it ideal for outdoor equipment, automotive assemblies, and machinery exposed to moisture. The precise Class 2B and 6H thread fits prevent cross-threading and leaks in pneumatic, hydraulic, or structural applications, ensuring operational integrity. The robust external hex drive design allows for high-torque installation with standard tools, streamlining maintenance and reducing assembly time. By providing a reliable and durable thread conversion solution, it minimizes downtime and component mismatch in global supply chains and multi-standard manufacturing setups.

Specification Summary & Compliance

This adapter guarantees dimensional accuracy with Class 2B (inch) and Class 6H (metric) thread tolerances. It is manufactured in accordance with ASTM A108 and ASTM B633 standards, ensuring consistent material properties and plating quality. The product is fully RoHS 3 (2015/863/EU) compliant under exemption 6(a)-I for lead as an alloying element in steel, confirming its adherence to environmental and safety regulations for industrial use.