S-91082A122 ASTM A108, ASTM B633 Inch-to-Metric Female Hex Thread Adapters

Key Features & Benefits at a Glance

• Seamless Inch-to-Metric Conversion: Effortlessly adapt between 5/16"-18 and M6 thread sizes, eliminating compatibility issues and reducing assembly time.
• Exceptional Durability & Corrosion Resistance: Constructed from zinc-plated steel, offering reliable protection against rust and wear in harsh industrial environments.
• High Tensile Strength for Demanding Applications: Withstands up to 78,000 psi, ensuring secure, vibration-resistant connections under heavy loads.
• Precision Thread Fit for Leak-Free Performance: Class 2B (inch) and Class 6H (metric) thread fits guarantee tight, accurate mating to prevent loosening and leaks.
• Robust External Hex Drive: Features a 1/2" hex size and 2 1/2" length for easy installation and removal with standard tools, enhancing maintenance efficiency.
• Certified Material Quality: Manufactured from steel meeting ASTM A108 standards, ensuring consistent mechanical properties and batch-to-batch reliability.
• Compliant with Environmental Regulations: RoHS 3 compliant, supporting sustainable procurement and safe use in regulated industries.

Professional Applications & Engineering Value

This female hex thread adapter is engineered to solve critical challenges in machinery, automotive, and construction sectors where mixed inch and metric thread systems coexist. The zinc-plated steel construction provides excellent corrosion resistance, extending service life in outdoor or high-moisture settings. Its Rockwell B85 hardness and 78,000 psi tensile strength ensure the adapter maintains integrity under dynamic stresses, preventing thread stripping or failure. The external hex drive with a substantial 1/2" hex size allows for high-torque application, making it ideal for hydraulic systems, heavy equipment, and precision assemblies requiring reliable 5/16"-18 to M6 conversion. By adhering to ASTM A108 and offering precise Class 2B/6H thread fits, it reduces downtime and replacement costs, delivering consistent performance in industrial thread adapter applications.

Specification Summary & Compliance

This adapter ensures dimensional accuracy with Class 2B (inch) and Class 6H (metric) thread fits, manufactured to ASTM A108 and ASTM B633 specifications for material and plating quality. It is RoHS 3 (2015/863/EU) compliant with exemption 6(a)-I, confirming adherence to environmental standards while maintaining alloy performance. The product meets industry requirements for tensile strength, hardness, and thread precision, supporting reliable use in compliant engineering projects.