S-91084A114 ASTM A108 Inch-to-Metric Female Hex Thread Adapters

Key Features & Benefits at a Glance

• Seamless Inch-to-Metric Conversion: Effortlessly connect 1/4"-20 (inch) and M3.5 (metric) components, eliminating compatibility issues and streamlining your assembly process.
• Exceptional Tensile Strength: With a 78,000 psi tensile strength, this adapter reliably handles high-stress applications, reducing the risk of mechanical failure.
• Superior Wear & Corrosion Resistance: The Black-Oxide Steel finish provides enhanced durability and protection against rust in demanding industrial environments.
• Precision Thread Fit for Leak-Free Connections: Class 2B and Class 6H thread fits ensure tight, secure, and vibration-resistant connections, minimizing the chance of loosening.
• Optimized for High-Torque Applications: The external 1/2" hex drive and 2 1/2" length offer excellent grip and leverage for easy installation and removal with standard tools.
• Guaranteed Material Consistency: Manufactured from ASTM A108 steel, this adapter delivers consistent performance, hardness (Rockwell B85), and dimensional accuracy.
• Compliant with Environmental Standards: RoHS 3 compliance ensures the adapter meets stringent environmental regulations, making it suitable for global supply chains.

Professional Applications & Engineering Value

This Inch-to-Metric Female Hex Thread Adapter is engineered to solve critical challenges in machinery, automotive, and heavy equipment manufacturing where mixed measurement systems are common. Its robust Black-Oxide Steel construction and high 78,000 psi tensile strength prevent stripping and deformation under dynamic loads. The precise Class 2B / 6H thread fit ensures leak-proof and secure connections in pneumatic, hydraulic, and structural assemblies, reducing maintenance downtime. By providing a reliable thread size conversion from 1/4"-20 to M3.5, it enhances assembly flexibility and inventory management for engineers and procurement specialists.

Specification Summary & Compliance

This adapter features precision threads with Class 2B (inch) and Class 6H (metric) fits, ensuring dimensional accuracy per standard tolerances. It is manufactured in compliance with the ASTM A108 specification for material quality and is RoHS 3 (2015/863/EU) compliant under exemption 6(a)-I for lead as an alloying element in steel.