S-91084A121 ASTM A108 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 – Effortlessly connect 4-40 (inch) to M3.5 (metric) components, eliminating compatibility issues in mixed-standard assemblies.
- Exceptional Tensile Strength – Withstands up to 78,000 psi tensile strength, ensuring reliable performance under high mechanical loads.
- Superior Durability & Corrosion Resistance – Black-oxide steel construction with Rockwell B85 hardness provides excellent wear resistance and protection in harsh environments.
- Precision Thread Fit – Class 2B (inch) and Class 6H (metric) thread fits guarantee secure, vibration-resistant connections without cross-threading.
- Easy Installation & Removal – External hex drive with 1/4" hex size allows for quick, tool-friendly assembly and disassembly.
- Industry Compliance & Safety – Meets ASTM A108 specifications and is RoHS 3 compliant, ensuring material quality and environmental safety.
- Robust Design for Demanding Use – 1 1/2" hex length and 9.5 mm thread length offer ample gripping surface and thread engagement for stable adaption.
Professional Applications & Engineering Value
This precision female hex thread adapter solves critical challenges in industries where inch and metric systems intersect, such as automotive, aerospace, and machinery manufacturing. Engineered from black-oxide steel, it resists corrosion and wear, extending service life in high-stress environments. The Class 2B and 6H thread fits ensure tight, reliable connections that minimize loosening under vibration, while the external hex drive simplifies maintenance. By enabling seamless 4-40 to M3.5 thread conversion, it reduces inventory needs and assembly errors, making it an essential component for global engineering projects requiring high-strength and precision.
Specification Summary & Compliance
This adapter features precise Class 2B (inch) and Class 6H (metric) thread tolerances, with thread sizes of 4-40 and M3.5 (0.6 mm pitch). It is manufactured in compliance with ASTM A108 standards and is RoHS 3 (2015/863/EU) compliant under exemption 6(a)-I, ensuring adherence to material and environmental regulations for safe industrial use.
