S-91084A134 ASTM A108 Inch-to-Metric Female Hex Thread Adapters

Key Features & Benefits at a Glance

• Seamless Inch-to-Metric Conversion – Enables reliable connection between 8-32 (inch) and M8 (metric) threaded components, eliminating compatibility issues in mixed-standard environments.
• Exceptional Durability & Load Capacity – Manufactured from ASTM A108 steel with 78,000 psi tensile strength and Rockwell B85 hardness to withstand high-torque applications without stripping or failure.
• Corrosion-Resistant Black-Oxide Finish – Provides enhanced protection against rust and wear in demanding industrial conditions, extending service life.
• Precision Thread Fit – Class 2B (inch) and Class 6H (metric) thread tolerances ensure secure, vibration-resistant connections with minimal backlash.
• Standard 1/2" External Hex Drive – Compatible with common wrenches and sockets for quick installation and removal, reducing downtime.
• RoHS 3 Compliant Construction – Meets environmental regulations (exemption 6(a)-I) for safe use in regulated industries.
• Heavy-Duty Hex Profile – 2 1/2" hex length offers superior grip and torque transmission during high-stress operations.

Professional Applications & Engineering Value

This female hex thread adapter solves critical challenges in machinery assembly, maintenance, and retrofit projects where inch and metric threading systems must interface reliably. The Black-Oxide steel construction, combined with Class 2B/6H thread fit, prevents cross-threading and ensures consistent clamping force in automotive, aerospace, and heavy equipment applications. Its high tensile strength (78,000 psi) and corrosion-resistant finish make it ideal for environments exposed to vibrations, moisture, or dynamic loads, reducing the need for frequent replacements and minimizing assembly errors during thread conversion tasks.

Specification Summary & Compliance

This adapter maintains precise Class 2B (inch) and Class 6H (metric) thread tolerances for accurate engagement. It is manufactured in compliance with ASTM A108 material standards and meets RoHS 3 (2015/863/EU) requirements with exemption 6(a)-I for lead as an alloying element in steel. The product ensures dimensional consistency across both 8-32 UNF and M8 x 1.25 mm thread systems, with a 1/2" external hex drive and 2 1/2" hex length for standardized tool compatibility.