S-91084A111 ASTM A108 Inch-to-Metric Female Hex Thread Adapters

Key Features & Benefits at a Glance

• Seamless Inch-to-Metric Conversion – Enables reliable connections between 10-32 and M4 threaded components, eliminating compatibility issues in mixed-standard assemblies.
• Exceptional Tensile Strength – Withstands up to 78,000 psi loads, ensuring secure, long-lasting performance under high-stress industrial conditions.
• Optimized Hardness for Durability – Rockwell B85 hardness provides excellent resistance to wear and deformation, extending service life in repetitive use.
• Precision Thread Fits – Class 2B (inch) and Class 6H (metric) thread tolerances guarantee smooth engagement and vibration resistance.
• Corrosion-Resistant Black-Oxide Finish – Protects against rust and environmental damage, maintaining integrity in harsh workshop or outdoor settings.
• Standardized External Hex Drive – 3/8" hex size offers universal tool compatibility and high torque application without slippage.
• Regulatory Compliance Assurance – Meets ASTM A108 material standards and RoHS 3 directives, ensuring safe, quality-approved use in regulated industries.

Professional Applications & Engineering Value

This female hex thread adapter solves critical challenges in machinery maintenance, automotive manufacturing, and equipment repair where inch and metric systems intersect. Crafted from black-oxide steel, it prevents galvanic corrosion when joining dissimilar metals, while the Class 2B/6H thread fits eliminate cross-threading risks during high-speed assembly. The external hex drive design allows quick installation with standard wrenches, reducing downtime in production lines. Engineers value its 78,000 psi tensile strength for load-bearing applications like hydraulic fittings or structural frames, where failure is not an option. By providing a certified RoHS 3 compliant solution, it supports sustainable manufacturing without compromising on ASTM A108 material reliability.

Specification Summary & Compliance

This adapter maintains precise Class 2B (10-32) and Class 6H (M4) thread tolerances per ISO standards, with a 3/8" hex drive and unified black-oxide steel construction. It conforms to ASTM A108 material specifications and is RoHS 3 (2015/863/EU) compliant under exemption 6(a)-I for lead as a steel alloying element, ensuring adherence to international environmental and safety regulations.