S-90202A215 5/16"-24 x 1 1/4" ASTM A582 Coupling Nuts

Coupling Nuts

0991FA00031 Coupling Nuts
0991FA00031 Coupling Nuts

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

Part No.
Part No. 0991FA00031
Equivalent to mcmaster :
90202A215

Basic Information

System of Measurement Inch
Nut Type Coupling
Specifications Met ASTM A582

Dimension Parameters

Length 1 1/4"
OD 27/64"

Thread Parameters

Thread Type UNF
Thread Size 5/16"-24
Threading Fully Threaded
Thread Direction Right Hand
Thread Spacing Fine
Thread Fit Class 2B

Head Parameters

Coupling Nut Profile Standard

Material & Strength Parameters

Material 18-8 Stainless Steel

Finish & Compliance Parameters

RoHS RoHS 3 (2015/863/EU) Compliant
REACH REACH (EC 1907/2006) (01/17/2023, 233 SVHC) Compliant
Technical Drawings No drawings available at the moment, will be launched soon
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Key Features & Benefits at a Glance

  • Superior corrosion resistance from 18-8 Stainless Steel construction, ideal for harsh environments and extending service life.
  • Precise and reliable connections ensured by the Class 2B thread fit, minimizing the risk of cross-threading and assembly issues.
  • Excellent vibration resistance due to the UNF fine thread profile, maintaining joint integrity in dynamic applications.
  • High-strength performance meeting ASTM A582 specifications, providing dependable load-bearing capacity.
  • Full thread engagement along the 1 1/4" length offers maximum adjustability and a secure grip on mating components.
  • Standard profile design ensures compatibility with common tools and simplifies installation.
  • Compliance with RoHS 3 and REACH guarantees environmental safety and meets stringent industrial regulations.

Professional Applications & Engineering Value

This 5/16"-24 UNF coupling nut is engineered to solve critical challenges in assembly and maintenance. The 18-8 Stainless Steel material provides exceptional corrosion resistance, making it suitable for applications exposed to moisture, chemicals, or outdoor elements, such as in marine, chemical processing, and food-grade equipment. The fully threaded design and fine thread spacing allow for precise adjustment and superior vibration resistance, which is crucial in automotive, aerospace, and machinery where loosening under stress is a common failure point. Manufactured to ASTM A582, it delivers consistent strength and durability, ensuring long-term reliability in demanding industrial applications while the Class 2B thread fit facilitates smooth, accurate mating with corresponding threaded rods or bolts, reducing installation time and improving overall assembly efficiency.

Specification Summary & Compliance

This coupling nut features a 5/16"-24 UNF thread with a Class 2B thread fit, ensuring precise dimensional accuracy and interchangeability. The standard OD of 27/64" and length of 1 1/4" provide consistent performance. It is manufactured in compliance with ASTM A582 for material and threading specifications. Additionally, the product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to environmental and safety standards for industrial use.

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