S-91072A392 ASTM A108, ASTM B633 Inch-to-Inch Female Hex Thread Adapters

Key Features & Benefits at a Glance

• Superior Durability – Zinc-plated steel construction and Rockwell B65 hardness provide excellent corrosion resistance and long-term wear performance in demanding industrial environments.
• High Tensile Strength – With a 75,000 psi tensile strength, this adapter reliably handles high-stress applications without failure, ensuring operational safety.
• Precision Thread Compatibility – Class 2B thread fit on both sides guarantees smooth, secure connections between 8-32 and 5/16"-18 threaded components, reducing assembly time and misalignment risks.
• Easy Installation & Removal – The external 1/2" hex drive and 2 1/2" length offer ample torque application surface, facilitating quick tool engagement and disassembly.
• Regulatory Compliance & Quality Assurance – Meets ASTM A108 and ASTM B633 specifications, and is RoHS 3 compliant, ensuring material consistency and environmental safety for global supply chains.
• Versatile Inch-to-Inch Adaptation – Enables seamless transition between different inch thread sizes, optimizing inventory and reducing the need for multiple custom fittings.
• Robust Hexagonal Design – The hex shape prevents rolling and provides a firm grip, enhancing stability during tightening in confined or high-vibration settings.

Professional Applications & Engineering Value

This female-to-female hex thread adapter is engineered to solve critical connectivity challenges in machinery, automotive, and structural assemblies. Its zinc-plated steel body resists rust and degradation, while the Class 2B thread fit ensures precise alignment between 8-32 and 5/16"-18 threads, minimizing cross-threading and leaks. The external hex drive allows for efficient torque application with standard tools, speeding up maintenance and reducing labor costs. Ideal for adapting thread sizes in hydraulic systems, conveyor setups, and heavy equipment, this adapter enhances assembly integrity and prolongs service life under dynamic loads and harsh conditions.

Specification Summary & Compliance

The adapter maintains Class 2B thread fit tolerances for consistent engagement, adhering to ASTM A108 and ASTM B633 manufacturing standards. It is RoHS 3 (2015/863/EU) compliant with exemption 6(a)-I, confirming lead-free alloy use in steel. Dimensions include a 1/2" hex size, 2 1/2" hex length, and thread lengths of 7/16" (8-32) and 5/8" (5/16"-18), ensuring reliable performance in inch-based systems.