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    2 Products
    About Hex Nuts
    industrial info icon

    Choose a hex nut with the right profile, material, and strength for your application.

    Mil. Spec. Hex Nuts

    These nuts are manufactured and tested to strict U.S. military standards for material and construction.
    High-Strength Steel
    Image of Product. Front orientation. Hex Nuts. Mil. Spec. Hex Nuts.
    Rated Grade 8, Grade C, or Class 10, these nuts are about 25% stronger than medium-strength steel nuts. They are commonly used to fasten components in valves, pumps, motors, and other high-stress applications. To avoid stripped threads during installation, make sure your screw has a comparable strength rating.
    Black-Oxide Steel—Typically chosen for their appearance, these nuts have a dark, matte coating to create a finished look. They offer minimal corrosion resistance, so they're best for dry environments.
    Cadmium Yellow-Chromate-Plated Steel— The plating creates a barrier against rust, so these nuts are suitable for most wet and outdoor environments. They also thread on smoothly without sticking.
    Thread
    Size
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    Mil. Spec.
    Fastener Strength
    Grade/Class
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    Black-Oxide Steel
    1/2"-20
    		3/4"7/16"Fed. Spec. FF-N-836, MS51968-15SAE Grade 8
    		194191A12000000
     
    Cadmium Yellow-Chromate-Plated Steel
    1/2"-20
    		3/4"7/16"Fed. Spec. FF-N-836, MS51968-15SAE Grade 8
    		594191A5500000
     
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