McMaster-Carr logo
    Filter by
    System of Measurement
    Fastener Strength Grade/Class
    Industrial Info Compare
    Nut Type
    Industrial Info Compare
    Thread Direction
    Thread Spacing
    Industrial Info Snippet
    Fastener Strength Rating
    Specifications Met
    Coupling Nut Profile
    Thread Type
    DFARS Specialty Metals
    Industrial Info Compare
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Width
    Attribute Image
    Sold As
    Thread Length
    Drive Style
    Industrial Info Snippet
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    14 Products

    Coupling Nuts

    Image of Product. Front orientation. Coupling Nuts. Coupling Nuts.
    Also known as extension nuts, these are commonly used to connect lengths of threaded rod and join threaded parts.
    Low-Strength Steel
    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.
    Steel—Best for dry environments since moisture will cause these nuts to rust.
    Each
    Thread
    Size
    Lg.
    Wd.
    Threading
    Min. Thread
    Lg.
    1-9
    10-49
    50-Up
    Steel
    1 3/8"-6
    		8"2 1/4"Partially Threaded3 7/8"90264A704000000000000000000
     

    Threaded Rods

    Anchor, connect, or hang components in a wide variety of applications, from mounting I-beams to suspending light fixtures.
    Medium-Strength Steel
    Image of Product. Front orientation. Threaded Rods. Threaded Rods.
    With tensile strengths from 110,000 psi to 125,000 psi, these rods are strong enough for most industrial applications, such as anchoring machinery and connecting pipe flanges. They are about twice as strong as low-strength steel rods. To avoid stripped threads during installation, make sure your nuts are also medium-strength steel.
    Steel—Best for dry environments since moisture will cause these rods to rust.
    Lg.,
    ft.
    Tensile Strength,
    psi
    Fastener Strength
    Grade/Class
    Hardness
    Specs.
    Met
    Each
    Steel
     
    1 3/8"-6
    1125,000ASTM Grade B7
    		Rockwell C35ASTM A193
    		98957A509000000
    2125,000ASTM Grade B7
    		Rockwell C35ASTM A193
    		98957A82300000
    3125,000ASTM Grade B7
    		Rockwell C35ASTM A193
    		98957A61800000
    6125,000ASTM Grade B7
    		Rockwell C35ASTM A193
    		98957A718000000
     
    High-Strength Steel
    Image of Product. Front orientation. Threaded Rods. Threaded Rods.
    With a tensile strength of 150,000 psi, these rods are strong enough to stabilize steel frameworks and structural supports, such as I-beams. They are about 25% stronger than medium-strength steel rods. To avoid stripped threads during installation, make sure your nuts are also high-strength steel.
    Steel—Best for dry environments since moisture will cause these rods to rust.
    Lg.,
    ft.
    Tensile Strength,
    psi
    Fastener Strength
    Grade/Class
    Hardness
    Specs. Met
    Each
    Steel
     
    1 3/8"-6
    1150,000ASTM Grade BD
    		Rockwell C33ASTM A354 Grade BD90322A397000000
    2150,000ASTM Grade BD
    		Rockwell C33ASTM A354 Grade BD90322A374000000
    3150,000ASTM Grade BD
    		Rockwell C33ASTM A354 Grade BD90322A239000000
    6150,000ASTM Grade BD
    		Rockwell C33ASTM A354 Grade BD90322A240000000
     
    Low-Strength Steel
    Image of Product. Front orientation. Threaded Rods. Threaded Rods.
    With a tensile strength of 50,000 psi or 60,000 psi, these rods are often used to suspend light fixtures, cable trays, and conduit from ceilings. They're about half the strength of medium-strength steel rods. To avoid stripped threads during installation, make sure your nuts are also low-strength steel.
    Zinc-Plated Steel—The most common choice for areas with occasional exposure to moisture.
    Lg.,
    ft.
    Tensile Strength,
    psi
    Hardness
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Steel
     
    1 3/8"-6
    350,000Rockwell B61198841A042000000
    650,000Rockwell B61198914A042000000
     
    Stainless Steel
    Image of Product. Front orientation. Threaded Rods. Threaded Rods.
    More corrosion resistant than steel rods and comparable in strength to low-strength steel.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these rods resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.
    Lg.,
    ft.
    Tensile Strength,
    psi
    Hardness
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
     
    1 3/8"-6
    170,000Rockwell B70198804A1280000000
    370,000Rockwell B70198847A280000000
    670,000Rockwell B70198920A316000000
     
    back to top