S-91082A126 ASTM A108, ASTM B633 Inch-to-Metric Female Hex Thread Adapters

Key Features & Benefits at a Glance

• Seamless thread conversion between 6-32 inch and M3.5 metric systems, eliminating compatibility issues in mixed-standard environments
• Superior corrosion resistance with zinc-plated steel construction, ensuring long-term reliability in demanding industrial conditions
• Exceptional mechanical strength with 78,000 psi tensile strength and Rockwell B85 hardness, preventing deformation under high torque applications
• Precision thread engagement with Class 2B (inch) and Class 6H (metric) thread fits, guaranteeing secure connections without cross-threading
• Optimal torque transmission through 1/4" external hex drive and 1-1/2" hex length, providing superior grip for wrenching tools
• Regulatory compliance assurance meeting ASTM A108/B633 specifications and RoHS 3 standards, suitable for regulated industries
• Dual-thread length design with 3/8" (inch) and 9.5mm (metric) engagement areas, accommodating various installation depths

Professional Applications & Engineering Value

This female hex thread adapter solves critical interoperability challenges in equipment maintenance, manufacturing, and assembly operations where both inch and metric fastening systems coexist. The zinc-plated steel construction provides essential corrosion protection for machinery exposed to industrial atmospheres, while the Rockwell B85 hardness ensures the adapter withstands repeated installation cycles without galling or wear. The precision-machined Class 2B/6H thread fits prevent leakage paths and connection failures in hydraulic systems, electrical enclosures, and precision instrumentation. With its 1/4" external hex drive, technicians can apply maximum torque without slippage, making it ideal for automotive repair, aerospace maintenance, and industrial equipment servicing where reliable thread conversion is paramount for operational continuity.

Specification Summary & Compliance

This inch-to-metric female hex adapter maintains precision dimensional standards with Class 2B thread fit for the 6-32 inch thread and Class 6H thread fit for the M3.5 metric thread. Manufactured in compliance with ASTM A108 for steel bar materials and ASTM B633 for zinc plating specifications. The adapter is RoHS 3 (2015/863/EU) compliant with exemption 6(a)-I for lead as an alloying element in steel, ensuring environmental regulatory adherence for global industrial applications.