S-91082A103 ASTM A108, ASTM B633 Inch-to-Metric Female Hex Thread Adapters
Inch-to-Metric Female Hex Thread Adapters
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Basic Information
Material & Strength Parameters
End A Thread Parameters
End B Thread Parameters
Hex Parameters
Drive Parameters
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Key Features & Benefits at a Glance
- Seamless Inch-to-Metric Conversion: Enables reliable connections between 4-40 (inch) and M2.5 (metric) components, eliminating compatibility issues in mixed-standard assemblies.
- Exceptional Tensile Strength: Withstands up to 78,000 psi for secure, vibration-resistant fastening in demanding applications.
- Superior Corrosion Resistance: Zinc-plated steel construction provides durable protection against rust and environmental wear.
- Precision Thread Fit: Class 2B (inch) and Class 6H (metric) threads ensure accurate, reliable engagement without cross-threading.
- Optimized Torque Application: External hex drive with 3/16" size allows for easy installation using standard tools, reducing assembly time.
- High Hardness for Durability: Rockwell B85 hardness maintains thread integrity and resists deformation under load.
- Regulatory Compliance: Meets ASTM A108/B633 specifications and is RoHS 3 compliant, ensuring safe use in regulated industries.
Professional Applications & Engineering Value
This female hex thread adapter is engineered to solve critical challenges in industrial assembly where inch and metric systems intersect. Its zinc-plated steel construction and Class 2B/6H thread fit prevent galling and seizing, even in high-vibration environments like machinery, automotive, and electronics. The external hex drive design ensures quick, tool-friendly installation, reducing labor costs and downtime. By providing a reliable 4-40 to M2.5 conversion, it eliminates the need for custom parts, streamlining inventory and enhancing assembly efficiency in global supply chains.
Specification Summary & Compliance
This adapter features precise Class 2B (inch) and Class 6H (metric) thread tolerances, with thread lengths of 1/4" (4-40) and 4.8 mm (M2.5). It is manufactured in compliance with ASTM A108 and ASTM B633 standards, ensuring consistent quality and performance. The product is RoHS 3 (2015/863/EU) compliant under exemption 6(a)-I, making it suitable for use in environmentally conscious industries.
