S-91084A101 ASTM A108 Inch-to-Metric Female Hex Thread Adapters

Key Features & Benefits at a Glance

• Seamless Inch-to-Metric Conversion - Enables reliable connections between 2-56 (inch) and M2.5 (metric) threaded components, eliminating compatibility issues in mixed-standard assemblies.
• Exceptional Durability & Corrosion Resistance - Black-Oxide Steel construction provides superior protection against rust and wear, extending service life in demanding environments.
• High Tensile Strength for Heavy-Duty Use - 78,000 psi tensile strength and Rockwell B85 hardness ensure the adapter withstands high mechanical loads without failure.
• Precision Thread Fit for Vibration Resistance - Class 2B (inch) and Class 6H (metric) thread fits maintain tight, secure connections that resist loosening under dynamic loads.
• Easy Installation with Standard Tools - External hex drive (3/16") allows quick installation and removal using common wrenches, reducing assembly time.
• Regulatory Compliance for Global Projects - RoHS 3 (2015/863/EU) compliant with exemption 6(a)-I ensures environmental safety for international supply chains.
• Certified Material Reliability - ASTM A108 specification guarantees consistent steel quality and performance across production batches.

Professional Applications & Engineering Value

This female hex thread adapter solves critical interoperability challenges in precision engineering applications where inch-to-metric conversion is required. The Black-Oxide Steel construction combined with Rockwell B85 hardness provides exceptional resistance to galling and corrosion in industrial environments like automotive manufacturing, aerospace subsystems, and electronic enclosures. The Class 2B/6H thread fit ensures zero-play connections that maintain integrity under vibration, while the external hex drive design enables torque-controlled installation without specialized tools. Engineers specify this adapter to bridge dimensional standards in multinational equipment designs, where 78,000 psi tensile strength prevents thread stripping in high-stress assembly applications.

Specification Summary & Compliance

This adapter maintains precision Class 2B (inch) and Class 6H (metric) thread tolerances with 2-56 to M2.5 conversion. Manufactured per ASTM A108 material specifications with RoHS 3 (2015/863/EU) compliance under exemption 6(a)-I for lead as steel alloying element. Thread lengths measure 0.187" (4.8mm) with 3/16" hex drive configuration.