S-91082A117 ASTM A108, ASTM B633 Inch-to-Metric Female Hex Thread Adapters

Key Features & Benefits at a Glance

• Seamless inch-to-metric conversion enables compatibility between 1/4"-20 and M4 threaded components, eliminating the need for multiple adapters and reducing assembly complexity.
• Exceptional durability and corrosion resistance provided by the zinc-plated steel construction, ensuring reliable performance in demanding industrial environments.
• High tensile strength of 78,000 psi and Rockwell B85 hardness guarantee the adapter can withstand significant mechanical stress and vibration without failure.
• Precision external hex drive with a 1/2" hex size allows for easy installation and removal using standard tools, improving maintenance efficiency.
• Reliable thread engagement with Class 2B (inch) and Class 6H (metric) thread fits ensures secure, leak-free connections in critical applications.
• Compliance with industry standards including ASTM A108 and ASTM B633 provides assurance of material quality and manufacturing consistency for engineering specifications.
• RoHS 3 compliance meets environmental regulations for use in global markets, supporting responsible sourcing and supply chain requirements.

Professional Applications & Engineering Value

This female hex thread adapter is engineered to solve critical connectivity challenges in industrial machinery, automotive systems, and heavy equipment where inch and metric thread standards intersect. The zinc-plated steel construction provides a robust barrier against corrosion, extending service life in harsh conditions. The external hex drive design facilitates quick tool access, reducing downtime during assembly or repairs. With a high tensile strength of 78,000 psi, it maintains integrity under dynamic loads, preventing thread stripping or failure. This adapter is ideal for OEMs and MRO operations requiring reliable thread conversion without compromising on performance or compliance with ASTM specifications.

Specification Summary & Compliance

This adapter ensures dimensional accuracy with Class 2B (inch) and Class 6H (metric) thread fits, providing precise engagement for secure connections. It is manufactured in accordance with ASTM A108 and ASTM B633 standards, guaranteeing material consistency and performance. The product is RoHS 3 (2015/863/EU) compliant under exemption 6(a)-I for lead as an alloying element in steel, meeting environmental and regulatory requirements for industrial use.