S-91082A118 ASTM A108, ASTM B633 Inch-to-Metric Female Hex Thread Adapters

Key Features & Benefits at a Glance

• Seamless Inch-to-Metric Conversion: Effortlessly connect 1/4"-20 and M5 threaded components, eliminating compatibility issues in mixed-standard environments.
• Exceptional Durability & Corrosion Resistance: The Zinc-Plated Steel construction provides a robust barrier against rust and wear, extending the adapter's service life in demanding conditions.
li>Superior Mechanical Strength: With a Rockwell B85 hardness and 78,000 psi tensile strength, this adapter reliably withstands high-torque applications and heavy loads without failure.
• Precision Thread Fit for Leak-Free Connections: The Class 2B (inch) and Class 6H (metric) thread fit ensures tight, secure, and vibration-resistant connections, minimizing the risk of loosening.
• Easy Installation & Removal: The external 1/2" hex drive with a generous 2 1/2" length offers excellent grip for standard wrenches, facilitating quick assembly and disassembly.
• Compliance with Industry Standards: Manufactured to meet ASTM A108 and ASTM B633 specifications, guaranteeing consistent quality, dimensional accuracy, and material integrity.
• Environmentally Conscious Manufacturing: RoHS 3 compliant, ensuring the adapter is free from hazardous substances and suitable for use in regulated industries.

Professional Applications & Engineering Value

This Inch-to-Metric female hex thread adapter is engineered to solve critical challenges in industrial assembly and maintenance, where equipment from different regions with varying thread standards must be integrated. The zinc-plated steel body provides excellent corrosion resistance, essential for outdoor machinery, automotive systems, and manufacturing plants exposed to moisture and chemicals. Its high tensile strength and precise Class 2B/6H thread fit prevent cross-threading and ensure a secure, leak-proof seal in hydraulic, pneumatic, and structural applications. By enabling reliable 1/4"-20 to M5 thread conversion, this adapter reduces downtime, eliminates the need for custom parts, and enhances the versatility of your tooling and equipment inventory.

Specification Summary & Compliance

This adapter guarantees dimensional precision with a Class 2B thread fit for the 1/4"-20 side and a Class 6H thread fit for the M5 side, ensuring optimal engagement and performance. It is manufactured in accordance with ASTM A108 and ASTM B633 standards, which govern the material properties and plating requirements. The product is fully RoHS 3 (2015/863/EU) compliant under exemption 6(a)-I, confirming its adherence to environmental regulations for lead as an alloying element in steel.