S-91082A113 ASTM A108, ASTM B633 Inch-to-Metric Female Hex Thread Adapters

Key Features & Benefits at a Glance

• Seamless Inch-to-Metric Conversion: Effortlessly connect 10-32 inch and M4 metric threaded components, eliminating compatibility issues and reducing assembly time.
• Exceptional Tensile Strength: With a 78,000 psi tensile strength, this adapter handles high-stress applications without failure, ensuring long-term joint integrity.
• Superior Corrosion Resistance: The zinc-plated steel construction provides a durable barrier against rust and corrosion, extending service life in harsh industrial environments.
• Optimized for High Torque: The 3/8" external hex drive and 2" hex length offer superior grip for easy installation and removal with standard tools, preventing slippage and damage.
• Precision Thread Fit: Manufactured to Class 2B (inch) and Class 6H (metric) thread fits, guaranteeing a secure, vibration-resistant connection that minimizes the risk of loosening.
• Certified Material Quality: Built from steel meeting ASTM A108 specifications, ensuring consistent material properties and reliable performance in demanding applications.
• Compliant for Global Use: Meets RoHS 3 (2015/863/EU) compliance standards, making it suitable for use in regulated markets and environmentally conscious operations.

Professional Applications & Engineering Value

This female hex thread adapter is engineered to solve critical connectivity challenges in machinery, automotive, and heavy equipment industries where inch and metric systems intersect. The zinc-plated steel material, combined with a Rockwell B85 hardness, provides excellent resistance to wear and galling, which is vital for components subjected to repeated assembly and disassembly. The precise Class 2B and 6H thread fits ensure a leak-proof and stable connection, preventing costly downtime from thread stripping or cross-threading in hydraulic systems, pneumatic tools, and precision assemblies. By offering a robust and reliable thread size adaptation solution, this adapter enhances assembly line efficiency and reduces the need for custom-machined parts, delivering significant engineering value.

Specification Summary & Compliance

This adapter features precision threads with a Class 2B fit for the 10-32 inch side and a Class 6H fit for the M4 x 0.7 mm metric side, ensuring dimensional accuracy and interchangeability. It is manufactured in compliance with ASTM A108 for material standards and ASTM B633 for the zinc plating process. The product is RoHS 3 (2015/863/EU) compliant under exemption 6(a)-I, confirming its adherence to environmental regulations for hazardous substances.