S-91072A391 ASTM A108, ASTM B633 Inch-to-Inch Female Hex Thread Adapters

Key Features & Benefits at a Glance

• Corrosion-resistant zinc-plated steel construction ensures long-term durability in harsh industrial environments
• High 75,000 psi tensile strength provides reliable performance under heavy mechanical loads
• Rockwell B65 hardness rating maintains thread integrity and prevents deformation during repeated use
• Precision Class 2B thread fit guarantees secure connections without cross-threading risks
• External hex drive with 1/2" hex size enables easy installation using standard tools
• Dual female thread configuration seamlessly adapts between 6-32 and 5/16"-18 systems
• RoHS 3 compliance meets international environmental standards for industrial applications

Professional Applications & Engineering Value

This female hex thread adapter solves critical connectivity challenges in industrial assembly by providing a reliable transition between different inch thread sizes. Engineered from zinc-plated steel with ASTM A108 certification, the adapter maintains dimensional stability under vibration and load stress. The Class 2B thread fit ensures precise engagement with mating components, eliminating play while facilitating quick installations. With its external hex drive and generous 2 1/2" hex length, technicians can apply optimal torque without damaging the threads. Ideal for maintenance operations, production lines, and equipment upgrades where converting between 6-32 and 5/16"-18 thread systems is required, this adapter reduces inventory needs while ensuring compatibility across machinery and fixtures.

Specification Summary & Compliance

Manufactured to ASTM A108 and ASTM B633 specifications with Class 2B thread fit tolerances for both 6-32 and 5/16"-18 threads. The adapter meets RoHS 3 (2015/863/EU) compliance with exemption 6(a)-I for lead as an alloying element in steel. Thread lengths measure 3/8" (6-32) and 5/8" (5/16"-18) respectively, ensuring sufficient engagement depth for secure connections.