S-91082A109 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 8-32 (inch) and M3.5 (metric) threaded components, eliminating compatibility issues in mixed-standard assemblies.
• Exceptional Tensile Strength – Withstands up to 78,000 psi, providing robust performance in high-stress applications and reducing the risk of mechanical failure.
• Superior Corrosion Resistance – Zinc-plated steel construction offers enhanced durability, protecting against rust and extending service life in harsh industrial environments.
• Precision Thread Fit – Class 2B (inch) and Class 6H (metric) thread fits ensure tight, secure connections with minimal backlash for consistent assembly quality.
• Easy Installation & Removal – External 1/4" hex drive allows for quick tool engagement, speeding up maintenance and reducing labor time.
• High Hardness Rating – Rockwell B85 hardness provides excellent wear resistance, maintaining thread integrity through repeated use.
• Compliance with Industry Standards – Meets ASTM A108 and ASTM B633 specifications, ensuring material consistency and performance reliability.

Professional Applications & Engineering Value

This female hex thread adapter is engineered to solve critical challenges in multi-standard industrial environments, where inch-to-metric conversion is frequently required. The zinc-plated steel construction, combined with precise Class 2B and 6H thread fits, prevents cross-threading and ensures leak-free, vibration-resistant connections in machinery, automotive, and electronic assemblies. Its high tensile strength (78,000 psi) and Rockwell B85 hardness make it ideal for heavy-duty applications, reducing downtime and replacement costs. The external hex drive design facilitates easy installation with standard tools, enhancing workflow efficiency in maintenance and production lines.

Specification Summary & Compliance

This adapter features precise thread dimensions: 8-32 (inch) with Class 2B fit and M3.5x0.6 mm (metric) with Class 6H fit, ensuring dimensional accuracy per industry standards. Manufactured from zinc-plated steel in compliance with ASTM A108 and ASTM B633, it meets rigorous material and plating requirements. The product is RoHS 3 (2015/863/EU) compliant under exemption 6(a)-I for lead as an alloying element in steel, supporting environmental and safety regulations in global supply chains.