S-91084A106 ASTM A108 Inch-to-Metric Female Hex Thread Adapters

Key Features & Benefits at a Glance

• Seamless Inch-to-Metric Conversion: Enables reliable mating between 6-32 (inch) and M3 (metric) threaded components, eliminating compatibility issues in mixed-standard assemblies.
• Superior Corrosion Resistance: The Black-Oxide Steel surface finish provides enhanced protection against rust and wear in demanding industrial environments.
• High Mechanical Strength: With a 78,000 psi tensile strength and Rockwell B85 hardness, this adapter withstands high loads and repetitive use without failure.
• Precision Thread Fit: Class 2B (inch) and Class 6H (metric) thread fits ensure tight, secure connections that resist loosening under vibration.
• Easy Installation & Removal: The external hex drive with a 3/16" hex size and 1" length allows for quick, tool-friendly installation in confined spaces.
• Regulatory Compliance: Meets ASTM A108 specifications and is RoHS 3 compliant, ensuring safety and environmental standards are upheld.
• Durable Thread Engagement: Generous thread lengths (3/8" for 6-32, 6.4 mm for M3) provide ample contact area for stable, long-lasting connections.

Professional Applications & Engineering Value

This female hex thread adapter solves critical challenges in machinery, automotive, and electronics manufacturing where inch-to-metric thread conversion is required. The Black-Oxide Steel construction, combined with high tensile strength and hardness, prevents stripping and corrosion in high-stress or humid conditions. Its external hex drive design facilitates easy torque application, reducing assembly time and tool wear. By ensuring precise Class 2B/6H thread fits, it minimizes the risk of cross-threading and leakage, making it ideal for adapting components in precision equipment, industrial fixtures, and international supply chain projects that demand reliable, standardized fastening solutions.

Specification Summary & Compliance

This adapter features precise Class 2B (inch) and Class 6H (metric) thread tolerances for accurate fit. It is manufactured in compliance with ASTM A108 standards and is RoHS 3 (2015/863/EU) compliant under exemption 6(a)-I for lead as an alloying element in steel. Thread sizes include 6-32 (inch) with 3/8" length and M3 with 0.5 mm pitch and 6.4 mm length, ensuring consistent performance in industrial applications.