Coupling Nuts

Product Specification
Length .010 to 24ʺ
Diameter .010 to 3ʺ
Thread Type UNC, UNF, Acme, Machine
Material Brass, Stainless Steel, Carbon Steel, Alloy Steel, Aluminum
Machine Surface Finish Up to a 16 micro
Tolerances +/-.001ʺ

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    Product Description

    Coupling nuts, also known as extension nuts, are used to join two male threads. The outer side is usually hex shaped which makes it easy to hold with a wrench. Norwood Screw Machine is one of the leading manufacturers and suppliers of coupling nuts in standard and custom specifications.

    Specifications of coupling nuts

    We can provide coupling nuts in the following specifications:

     Features  Specifications
    Head Types Hexagonal, Round
    Length .010ʺ to 24ʺ
    Diameters .010ʺ to 3ʺ
    Tolerances +/-.001
    Machine Surface Finish Up to a 16 micro
    Materials Stainless steel, brass, aluminum, alloy steel, carbon steel, plastics, aircraft aluminum
    Finish/Coating Zinc, black oxide, anodized, waxed
    Thread Types UNC, ACME, Machine, UNF

    Beneficial Features of Coupling Nuts

    There are several benefits of coupling nuts which makes them popular in diverse industries.  Some of them are:

    1. The nuts can be used to join different parts, such as a threaded bolt, or hanger bolt. Also the nuts can be used to join similar parts with the same size and thread pitch.
    2. The small hole in the nut allows visual verification in order to check if the threads are fully engaged.
    3. Also the nuts are used as standoffs or spacers.

    Industries Using Norwood’s Coupling Nuts

    Coupling nuts serve a wide range of industries and are used in a broad variety of applications. Below are some of the industries served:

    1. Agricultural
    2. Automotive and Transportation
    3. Heavy Machinery
    4. Marine
    5. Mining
    6. Construction

    All our coupling nuts are made from high quality materials.  If you have any inquiries regarding our coupling nuts or other fastener products, please call us on our toll-free number 1-800-437-6644. You can also send us an email at

    See Other Nut Products Catalog

    Industries We Served

    Quality Control

    We know that we are - and should be - judged by how quickly, accurately & cost-effectively we meet our customer's needs. Our in-house quality assurance team begins the process with the receipt of an order. They maintain close communications with customers to ensure that customer goal are clearly understood & completely achieved.



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    Customer Testimonials

    The staff is very helpful fine tuning ideas. The workmanship is flawless. I was very pleased with their services!


    The staff is very helpful fine tuning ideas. The workmanship is flawless. I was very pleased with their services!


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