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    55 Products

    Round Coupling Nuts

    Less bulky than hex coupling nuts, these have a smooth, round body that fits in tight spots. Their finished appearance makes them a common choice for decorative applications. Tighten by hand, or use soft-jaw pliers to avoid marring the outside surface. Also known as extension nuts, they are commonly used to connect lengths of threaded rod and join threaded parts.
    Steel
    Image of Product. Front orientation. Coupling Nuts. Round Coupling Nuts.
    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.
    OD
    Threading
    Specs.
    Met
    1-9
    10-Up
    Black-Oxide Steel
    1/2"-28
    1 1/4"37/64"Fully ThreadedASTM A108000000000000000000000
     

    Inch-to-Inch Female Hex Thread Adapters

    Image of Product. Front orientation. Contains Annotated. Thread Adapters. Inch-to-Inch Female Hex Thread Adapters.
    Image of Attribute. Front orientation. Contains Annotated. Thread Adapters. Inch-to-Inch Female Hex Thread Adapters.
    Connect two differently sized male-threaded parts, such as threaded rods, and tighten with a standard wrench. The threads on these adapters have various sizes and spacing, so you can increase or decrease thread size or adapt from coarse to fine threading. You can also use them to change the gender of a connection from male to female. Small adapters can work as threaded standoffs, which position and separate circuit boards and other components in assemblies.
    Aluminum—Aluminum adapters are about one third of the weight of steel adapters and resist corrosion in wet environments.
    18-8 Stainless Steel—18-8 stainless steel adapters withstand wet environments but will corrode when exposed to salt water and other chloride solutions.
    316 Stainless Steel—316 stainless steel adapters are ideal in wet environments and will not corrode when exposed to salt water or harsh chemicals.
    ASTM A276, ASTM A582, and ASTM B211—Adapters that meet ASTM specifications are made from or plated with materials that adhere to specific standards for chemical and physical properties, such as hardness.
    Thread
    Lg.
    Thread
    Fit
    Hex
    Each
    Thread Size
    (A)
    Thread Size
    (B)
    (A)
    (B)
    (A)
    (B)
    Size
    Length
    Specs.
    Met
    Tensile Strength,
    psi
    Hardness
    1-9
    10-Up
    Aluminum
    3/8"-16
    1/2"-28
    3/8"1/2"Unified Standard Class 2B
    Unified Standard Class 2B
    5/8"1 1/4"ASTM B21145,000Rockwell B560000000000000000000
    1/2"-13
    1/2"-28
    1/2"1/2"Unified Standard Class 2B
    Unified Standard Class 2B
    5/8"2 1/4"ASTM B21145,000Rockwell B5600000000000000000
    1/2"-28
    5/8"-11
    1/2"5/8"Unified Standard Class 2B
    Unified Standard Class 2B
    7/8"1 3/4"ASTM B21145,000Rockwell B5600000000000000000
    1/2"-28
    3/4"-10
    1/2"3/4"Unified Standard Class 2B
    Unified Standard Class 2B
    1"2 1/4"ASTM B21145,000Rockwell B5600000000000000000
     
    18-8 Stainless Steel
    1/4"-20
    1/2"-28
    5/8"1/2"Unified Standard Class 2B
    Unified Standard Class 2B
    5/8"1 1/4"ASTM A58285,000Rockwell B8000000000000000000
    1/4"-28
    1/2"-28
    1/4"1/2"Unified Standard Class 2B
    Unified Standard Class 2B
    5/8"1 1/4"ASTM A58285,000Rockwell B80000000000000000000
    1/4"-32
    1/2"-28
    1/4"1/2"Unified Standard Class 2B
    Unified Standard Class 2B
    5/8"1 1/4"ASTM A58285,000Rockwell B800000000000000000000
    5/16"-18
    1/2"-28
    5/16"1/2"Unified Standard Class 2B
    Unified Standard Class 2B
    5/8"1 1/4"ASTM A58285,000Rockwell B80000000000000000000
    5/16"-24
    1/2"-28
    5/16"1/2"Unified Standard Class 2B
    Unified Standard Class 2B
    5/8"1 1/4"ASTM A58285,000Rockwell B80000000000000000000
    5/16"-32
    1/2"-28
    5/16"1/2"Unified Standard Class 2B
    Unified Standard Class 2B
    5/8"1 1/4"ASTM A58285,000Rockwell B800000000000000000000
    3/8"-16
    1/2"-28
    3/8"1/2"Unified Standard Class 2B
    Unified Standard Class 2B
    5/8"1 1/4"ASTM A58285,000Rockwell B80000000000000000000
    3/8"-24
    1/2"-28
    3/8"1/2"Unified Standard Class 2B
    Unified Standard Class 2B
    5/8"1 1/4"ASTM A58285,000Rockwell B80000000000000000000
    3/8"-32
    1/2"-28
    3/8"1/2"Unified Standard Class 2B
    Unified Standard Class 2B
    5/8"1 1/4"ASTM A58285,000Rockwell B80000000000000000000
    1/2"-13
    1/2"-28
    1/2"1/2"Unified Standard Class 2B
    Unified Standard Class 2B
    5/8"2 1/4"ASTM A58285,000Rockwell B800000000000000000000
    1/2"-20
    1/2"-28
    1/2"1/2"Unified Standard Class 2B
    Unified Standard Class 2B
    5/8"2 1/4"ASTM A58285,000Rockwell B800000000000000000000
    1/2"-28
    5/8"-11
    1/2"5/8"Unified Standard Class 2B
    Unified Standard Class 2B
    7/8"1 3/4"ASTM A58285,000Rockwell B800000000000000000000
    1/2"-28
    3/4"-10
    1/2"3/4"Unified Standard Class 2B
    Unified Standard Class 2B
    1"2 1/4"ASTM A58285,000Rockwell B800000000000000000000
    1/2"-28
    1"-8
    1/2"1"Unified Standard Class 2B
    Unified Standard Class 2B
    1 3/8"2"ASTM A58285,000Rockwell B800000000000000000000
     
    316 Stainless Steel
    1/4"-20
    1/2"-28
    5/8"1/2"Unified Standard Class 2B
    Unified Standard Class 2B
    5/8"1 1/4"ASTM A27675,000Rockwell B83000000000000000000
    5/16"-18
    1/2"-28
    5/16"1/2"Unified Standard Class 2B
    Unified Standard Class 2B
    5/8"1 1/4"ASTM A27675,000Rockwell B830000000000000000000
    3/8"-16
    1/2"-28
    3/8"1/2"Unified Standard Class 2B
    Unified Standard Class 2B
    5/8"1 1/4"ASTM A27675,000Rockwell B830000000000000000000
    1/2"-13
    1/2"-28
    1/2"1/2"Unified Standard Class 2B
    Unified Standard Class 2B
    5/8"2 1/4"ASTM A27675,000Rockwell B830000000000000000000
    1/2"-28
    5/8"-11
    1/2"5/8"Unified Standard Class 2B
    Unified Standard Class 2B
    7/8"1 3/4"ASTM A27675,000Rockwell B830000000000000000000
    1/2"-28
    3/4"-10
    1/2"3/4"Unified Standard Class 2B
    Unified Standard Class 2B
    1"2 1/4"ASTM A27675,000Rockwell B830000000000000000000
    1/2"-28
    1"-8
    1/2"1"Unified Standard Class 2B
    Unified Standard Class 2B
    1 3/8"2"ASTM A27675,000Rockwell B830000000000000000000
     

    Inch-to-Metric Female Hex Thread Adapters

    Image of Product. Front orientation. Contains Annotated. Thread Adapters. Inch-to-Metric Female Hex Thread Adapters.
    Image of Attribute. Front orientation. Contains Annotated. Thread Adapters. Inch-to-Metric Female Hex Thread Adapters.
    Adapt threaded rods from inch to metric. These adapters connect two male-threaded fasteners, so you can change the gender of a mating part or increase or decrease its thread size. The hex-shaped body fits into the head of a standard wrench. Small adapters can also be used as standoffs, positioning and separating circuit boards and other components in assemblies.
    Aluminum—At about a third of the weight of steel adapters, aluminum adapters are the lightest we offer. They resist corrosion in wet environments.
    18-8 Stainless Steel—18-8 stainless steel adapters resist corrosion caused by water. They're good for wet and damp environments but will corrode when exposed to salt water and other chloride solutions.
    316 Stainless Steel—316 stainless steel adapters have the best corrosion resistance. They stand up to wet environments, just like 18-8 stainless steel adapters, but unlike 18-8 stainless steel adapters, they resist corrosion caused by salt water and harsh chemicals.
    ASTM A276, ASTM A582, and ASTM B211—Adapters that meet ASTM specifications are made from or plated with materials that adhere to specific standards for chemical and physical properties, such as hardness.
    Thread
    Lg.
    Thread
    Fit
    Hex,
    mm
    Each
    Thread Size
    (A)
    Thread Size
    (B)
    (A)
    (B),
    mm
    (A)
    (B)
    Size
    Length
    Specs.
    Met
    Tensile Strength,
    psi
    Hardness
    1-9
    10-Up
    Aluminum
    1/2"-28
    M6 x 1 mm1/2"6Unified Standard Class 2B
    Metric Class 6H
    1838ASTM B21145,000Rockwell B56000000000000000000000
    1/2"-28
    M8 x 1.25 mm1/2"8Unified Standard Class 2B
    Metric Class 6H
    1838ASTM B21145,000Rockwell B560000000000000000000
    1/2"-28
    M10 x 1 mm1/2"10Unified Standard Class 2B
    Metric Class 6H
    1838ASTM B21145,000Rockwell B560000000000000000000
    1/2"-28
    M10 x 1.25 mm1/2"10Unified Standard Class 2B
    Metric Class 6H
    1838ASTM B21145,000Rockwell B560000000000000000000
    1/2"-28
    M10 x 1.5 mm1/2"10Unified Standard Class 2B
    Metric Class 6H
    1838ASTM B21145,000Rockwell B560000000000000000000
    1/2"-28
    M12 x 1.25 mm1/2"12Unified Standard Class 2B
    Metric Class 6H
    1838ASTM B21145,000Rockwell B560000000000000000000
    1/2"-28
    M12 x 1.75 mm1/2"12Unified Standard Class 2B
    Metric Class 6H
    1838ASTM B21145,000Rockwell B560000000000000000000
    1/2"-28
    M16 x 2 mm1/2"16Unified Standard Class 2B
    Metric Class 6H
    2154ASTM B21145,000Rockwell B560000000000000000000
     
    18-8 Stainless Steel
    1/2"-28
    M6 x 0.75 mm1/2"6Unified Standard Class 2B
    Metric Class 6H
    1838ASTM A58285,000Rockwell B800000000000000000000
    1/2"-28
    M6 x 1 mm1/2"6Unified Standard Class 2B
    Metric Class 6H
    1838ASTM A58285,000Rockwell B800000000000000000000
    1/2"-28
    M8 x 1 mm1/2"8Unified Standard Class 2B
    Metric Class 6H
    1838ASTM A58285,000Rockwell B800000000000000000000
    1/2"-28
    M8 x 1.25 mm1/2"8Unified Standard Class 2B
    Metric Class 6H
    1838ASTM A58285,000Rockwell B800000000000000000000
    1/2"-28
    M10 x 1 mm1/2"10Unified Standard Class 2B
    Metric Class 6H
    1838ASTM A58285,000Rockwell B800000000000000000000
    1/2"-28
    M10 x 1.25 mm1/2"10Unified Standard Class 2B
    Metric Class 6H
    1838ASTM A58285,000Rockwell B800000000000000000000
    1/2"-28
    M10 x 1.5 mm1/2"10Unified Standard Class 2B
    Metric Class 6H
    1838ASTM A58285,000Rockwell B800000000000000000000
    1/2"-28
    M12 x 1.25 mm1/2"12Unified Standard Class 2B
    Metric Class 6H
    1838ASTM A58285,000Rockwell B800000000000000000000
    1/2"-28
    M12 x 1.5 mm1/2"12Unified Standard Class 2B
    Metric Class 6H
    1838ASTM A58285,000Rockwell B800000000000000000000
    1/2"-28
    M12 x 1.75 mm1/2"12Unified Standard Class 2B
    Metric Class 6H
    1838ASTM A58285,000Rockwell B800000000000000000000
    1/2"-28
    M16 x 2 mm1/2"16Unified Standard Class 2B
    Metric Class 6H
    2154ASTM A58285,000Rockwell B800000000000000000000
     
    316 Stainless Steel
    1/2"-28
    M6 x 1 mm1/2"6Unified Standard Class 2B
    Metric Class 6H
    1838ASTM A27675,000Rockwell B830000000000000000000
    1/2"-28
    M8 x 1 mm1/2"8Unified Standard Class 2B
    Metric Class 6H
    1838ASTM A27675,000Rockwell B830000000000000000000
    1/2"-28
    M8 x 1.25 mm1/2"8Unified Standard Class 2B
    Metric Class 6H
    1838ASTM A27675,000Rockwell B830000000000000000000
    1/2"-28
    M10 x 1 mm1/2"10Unified Standard Class 2B
    Metric Class 6H
    1838ASTM A27675,000Rockwell B830000000000000000000
    1/2"-28
    M10 x 1.25 mm1/2"10Unified Standard Class 2B
    Metric Class 6H
    1838ASTM A27675,000Rockwell B830000000000000000000
    1/2"-28
    M10 x 1.5 mm1/2"10Unified Standard Class 2B
    Metric Class 6H
    1838ASTM A27675,000Rockwell B830000000000000000000
    1/2"-28
    M12 x 1.25 mm1/2"12Unified Standard Class 2B
    Metric Class 6H
    1838ASTM A27675,000Rockwell B830000000000000000000
    1/2"-28
    M12 x 1.5 mm1/2"12Unified Standard Class 2B
    Metric Class 6H
    1838ASTM A27675,000Rockwell B830000000000000000000
    1/2"-28
    M12 x 1.75 mm1/2"12Unified Standard Class 2B
    Metric Class 6H
    1838ASTM A27675,000Rockwell B830000000000000000000
    1/2"-28
    M16 x 2 mm1/2"16Unified Standard Class 2B
    Metric Class 6H
    2154ASTM A27675,000Rockwell B830000000000000000000
     
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