S-91082A139 ASTM A108, ASTM B633 Inch-to-Metric Female Hex Thread Adapters

Inch-to-Metric Female Hex Thread Adapters

1481FA00042 Inch-to-Metric Female Hex Thread Adapters
1481FA00042 Inch-to-Metric Female Hex Thread Adapters

Image may differ from product. See technical specification for details.

Part No.
Part No. 1481FA00042
Equivalent to mcmaster :
91082A139

Basic Information

For Adapting Thread Size
System of Measurement (A) Inch
System of Measurement (B) Metric
Shape Hex
Specifications Met ASTM A108, ASTM B633
RoHS RoHS 3 (2015/863/EU) compliant with exemption 6(a)-I - Lead as an alloying element in steel

Material & Strength Parameters

Material Zinc-Plated Steel
Tensile Strength 78000 psi
Hardness Rockwell B85

End A Thread Parameters

Thread Size (A) 10-32
Thread Length (A) 1/2"
Gender (A) Female
Thread Fit (A) Class 2B

End B Thread Parameters

Thread Size (B) M8
Thread Length (B) 16 mm
Gender (B) Female
Thread Fit (B) Class 6H
Thread Size Pitch (B) 1.25 mm

Hex Parameters

Hex Size 1/2"
Hex Length 2 1/2"

Drive Parameters

Drive Style External Hex
Technical Drawings No drawings available at the moment, will be launched soon
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Key Features & Benefits at a Glance

  • Seamless Inch-to-Metric Conversion: Enables reliable connection between 10-32 and M8 threaded components, eliminating compatibility issues in mixed-standard environments.
  • Superior Corrosion Resistance: Zinc-plated steel construction provides excellent protection against rust and wear in demanding industrial conditions.
  • Exceptional Mechanical Strength: With 78,000 psi tensile strength and Rockwell B85 hardness, withstands high torque and heavy loads without deformation.
  • Precision Thread Fit: Class 2B (inch) and Class 6H (metric) thread fits ensure secure, vibration-resistant connections with minimal risk of cross-threading.
  • Convenient External Hex Drive: 1/2" hex drive allows for easy installation and removal using standard wrenches, reducing assembly time.
  • Rigorous Quality Compliance: Manufactured to ASTM A108 and ASTM B633 standards, guaranteeing consistent performance and material integrity.
  • Environmental Responsibility: RoHS 3 compliant with exemption 6(a)-I, meeting strict regulatory requirements for industrial use.

Professional Applications & Engineering Value

This female hex thread adapter solves critical challenges in equipment maintenance and assembly where inch and metric systems intersect. The zinc-plated steel material, combined with precise Class 2B and 6H thread fits, prevents galvanic corrosion and ensures leak-proof, stable connections in high-vibration environments like machinery, automotive, and construction. Its external hex drive design facilitates quick tool engagement, streamlining workflows in tight spaces. By meeting ASTM A108/B633 specifications, it delivers consistent dimensional accuracy and durability, reducing downtime and replacement costs in industrial applications requiring robust thread adaptation.

Specification Summary & Compliance

This adapter maintains precise thread fits (Class 2A/6H) and dimensional tolerances per inch (10-32) and metric (M8 x 1.25 mm) standards. It conforms to ASTM A108 and ASTM B633 manufacturing specifications for material and plating quality. The product is RoHS 3 (2015/863/EU) compliant with exemption 6(a)-I for lead as an alloying element in steel, ensuring adherence to environmental and safety regulations.

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