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    8 Products

    Coupling Nuts

    Also known as extension nuts, these are commonly used to connect lengths of threaded rod and join threaded parts.
    Low-Strength Steel
    Image of Product. Front orientation. Coupling Nuts. Coupling Nuts.
    Rated Grade 2 or lower, these are about half as strong as medium-strength steel coupling nuts. Use them with threaded rods that have a comparable strength rating to avoid stripping threads during installation.
    Zinc-Plated Steel—A step up from plain steel, the zinc plating withstands occasional exposure to moisture.
    Black-Oxide Steel—A dark, matte coating creates a finished look. Nuts offer minimal corrosion resistance, so they're best for dry environments.
    Each
    Thread Size
    Lg.,
    mm
    Wd.,
    mm
    Threading
    Specs.
    Met
    1-9
    10-49
    50-Up
    Zinc-Plated Steel
    M30 × 3.5 mm9046Fully ThreadedDIN 633493355A5800000000000000000000
     
    Black-Oxide Steel
    M30 × 3.5 mm9046Fully ThreadedDIN 633493020A1110000000000000000
     
    Medium-Strength Steel
    Image of Product. Front orientation. Coupling Nuts. Coupling Nuts.
    These Grade 5 or Class 8 nuts are about twice as strong as low-strength steel coupling nuts. Use them with threaded rods that have a comparable strength rating to avoid stripping threads during installation.
    Zinc-Plated Steel—A step up from plain steel, the zinc plating withstands occasional exposure to moisture.
    Black-Oxide Steel—A dark, matte coating creates a finished look. Nuts offer minimal corrosion resistance, so they're best for dry environments.
    Each
    Thread Size
    Lg.,
    mm
    Wd.,
    mm
    Fastener Strength
    Grade/Class
    Threading
    Specs. Met
    Certificate Type
    1-9
    10-49
    50-Up
    Zinc-Plated Steel
    M30 × 3.5 mm9046Class 8
    		Fully ThreadedDIN 6334—90009A228000000000000000000
     
    Black-Oxide Steel
    M30 × 3.5 mm9046Class 8
    		Fully ThreadedASME B18.2.2, DIN 6334Material Certificate
    		90082A125000000000000000
     
    High-Strength Steel
    Image of Product. Front orientation. Coupling Nuts. Coupling Nuts.
    Rated Grade 8 or Class 10, these are about 25% stronger than medium-strength steel coupling nuts. Use them with threaded rods that have a comparable strength rating to avoid stripping threads during installation.
    Zinc-Plated Steel—A step up from plain steel, the zinc plating withstands occasional exposure to moisture.
    Steel—Best for dry environments since moisture will cause these nuts to rust.
    Each
    Thread Size
    Lg.,
    mm
    Wd.,
    mm
    Fastener Strength
    Grade/Class
    Threading
    Specs.
    Met
    Certificate Type
    1-9
    10-49
    50-Up
    Zinc-Plated Steel
    M30 × 3.5 mm9046Class 10
    		Fully ThreadedDIN 6334Material Certificate
    		90331A5550000000000000000000
     
    Steel
    M30 × 3.5 mm9046Class 10
    		Fully ThreadedDIN 6334—97778A170000000000000000
     
    Corrosion-Resistant Stainless Steel
    Image of Product. Front orientation. Coupling Nuts. Coupling Nuts.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these nuts resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.
    Each
    Thread Size
    Lg.,
    mm
    Wd.,
    mm
    Threading
    Specs. Met
    1-9
    10-49
    50-Up
    18-8 Stainless Steel
    M30 × 3.5 mm9046Fully ThreadedASME B18.2.2, DIN 633493590A316000000000000000000
     

    High-Profile Hex Nuts

    Image of Product. Bottom orientation. Hex Nuts. High-Profile Hex Nuts.
    Slightly taller than standard-profile hex nuts, these have a larger gripping area so your wrench or socket won't slip off as you tighten them. They're often used in vehicles and machinery where fasteners can be difficult to reach.
    Medium-Strength Steel
    These Grade 5 or Class 8 nuts are your go-to for fastening most machinery and equipment. To avoid stripped threads during installation, make sure your screw has a comparable strength rating.
    Zinc-Plated Steel—A step up from plain steel, the zinc plating withstands occasional exposure to moisture.
    Thread Size
    Wd.,
    mm
    Ht.,
    mm
    Fastener Strength
    Grade/Class
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Steel
    M30 × 3.5 mm4628Class 8
    		190725A77000000
     
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