S-91084A104 ASTM A108 Inch-to-Metric Female Hex Thread Adapters
Inch-to-Metric Female Hex Thread Adapters
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Basic Information
Material & Strength Parameters
End A Thread Parameters
End B Thread Parameters
Hex Parameters
Drive Parameters
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Key Features & Benefits at a Glance
- Seamless Inch-to-Metric Conversion – Enables reliable adaptation between 4-40 and M3 thread systems, eliminating compatibility issues in mixed-standard assemblies.
- Exceptional Tensile Strength – Withstands up to 78,000 psi, providing robust performance under high-stress industrial conditions.
- Superior Corrosion Resistance – Black-oxide steel finish offers enhanced protection against rust and wear in demanding environments.
- Precision Thread Fit – Class 2B (inch) and Class 6H (metric) thread tolerances ensure secure, vibration-resistant connections.
- Optimized Hex Drive Design – External 3/16" hex with 1" length allows for easy installation and removal using standard tools.
- Certified Material Quality – Manufactured from ASTM A108 steel with Rockwell B85 hardness, guaranteeing consistent durability and load-bearing capacity.
- Environmental Compliance – RoHS 3 (2015/863/EU) compliant, meeting global regulatory standards for safe industrial use.
Professional Applications & Engineering Value
This female hex thread adapter solves critical challenges in machinery, automotive, and electronics assembly where inch-to-metric thread conversion is required. The black-oxide steel construction, combined with Rockwell B85 hardness, resists corrosion and mechanical stress, extending service life in high-vibration settings. Its Class 2B and 6H thread fits maintain alignment integrity, preventing cross-threading during repeated installations. Ideal for adapting components in control systems, precision instruments, or hydraulic fittings, this adapter ensures zero downtime with its 78,000 psi tensile strength and external hex drive for quick maintenance.
Specification Summary & Compliance
Thread sizes: 4-40 (inch, Class 2B fit) to M3 x 0.5 mm (metric, Class 6H fit). Thread lengths: 1/4" (inch) / 6.4 mm (metric). Hex drive: 3/16" size, 1" length. Manufactured to ASTM A108 specifications with RoHS 3 (2015/863/EU) compliance under exemption 6(a)-I for lead as an alloying element in steel.
