S-91072A378 ASTM A108, ASTM B633 Inch-to-Inch Female Hex Thread Adapters

Inch-to-Inch Female Hex Thread Adapters

1479FA00027 Inch-to-Inch Female Hex Thread Adapters
1479FA00027 Inch-to-Inch Female Hex Thread Adapters

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Part No.
Part No. 1479FA00027
Equivalent to mcmaster :
91072A378

Basic Information

For Adapting Thread Size
System of Measurement (A) Inch
System of Measurement (B) Inch
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 75000 psi
Hardness Rockwell B65

End A Thread Parameters

Thread Size (A) 2-56
Thread Length (A) 3/16"
Gender (A) Female
Thread Fit (A) Class 2B

End B Thread Parameters

Thread Size (B) 4-40
Thread Length (B) 1/4"
Gender (B) Female
Thread Fit (B) Class 2B

Hex Parameters

Hex Size 3/16"
Hex Length 1"

Drive Parameters

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

  • Seamless Thread Conversion: Effortlessly adapt from 2-56 to 4-40 threads, eliminating compatibility issues and reducing assembly time.
  • Exceptional Durability: Constructed from zinc-plated steel with a Rockwell B65 hardness, ensuring long-lasting performance in demanding environments.
  • High Tensile Strength: Withstands up to 75,000 psi, providing reliable connections that resist loosening under vibration and load.
  • Precision Thread Fit: Class 2B threads on both sides guarantee a secure, accurate fit for leak-proof and stable assemblies.
  • Easy Installation & Removal: External hex drive with a 3/16" hex size and 1" length offers superior grip for standard tools, speeding up maintenance.
  • Industry Compliance: Meets ASTM A108 and ASTM B633 specifications, ensuring material quality and performance you can trust.
  • Environmentally Responsible: RoHS 3 compliant, supporting sustainable manufacturing practices without compromising on lead-containing steel alloy strength.

Professional Applications & Engineering Value

This female hex thread adapter is engineered to solve common challenges in industrial assembly, such as mismatched thread sizes and the need for reliable, high-strength connections. Made from zinc-plated steel, it offers excellent corrosion resistance, extending service life in applications like machinery, automotive systems, and electronic enclosures. The precise Class 2B thread fit ensures minimal play, reducing the risk of leaks and failures in thread conversion tasks. Its external hex drive design allows for quick tool engagement, streamlining installations in tight spaces. By adhering to ASTM standards, this adapter delivers consistent performance, making it ideal for B2B procurement where precision and durability are critical for minimizing downtime and maintenance costs.

Specification Summary & Compliance

This adapter features precise Class 2B thread fits for both 2-56 and 4-40 sides, ensuring dimensional accuracy per inch system standards. It complies with ASTM A108 and ASTM B633 manufacturing specifications, and is RoHS 3 (2015/863/EU) compliant under exemption 6(a)-I for lead as an alloying element in steel, affirming its suitability for regulated industrial use.

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