McMaster-Carr logo
    Filter by
    System of Measurement
    Fastener Strength Grade/Class
    Industrial Info Compare
    Thread Pitch
    Industrial Info Snippet
    Attribute Image
    Fastener Strength Rating
    Thread Direction
    Thread Spacing
    Industrial Info Snippet
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Sold As
    DFARS Specialty Metals
    Industrial Info Compare
    Nut Type
    Industrial Info Compare
    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)
    17 Products

    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.
    Zinc-Plated Steel—The most common choice for areas with occasional exposure to moisture.
    Steel—Best for dry environments since moisture will cause these rods to rust.
    Lg.
    Tensile Strength,
    psi
    Fastener Strength
    Grade/Class
    Hardness
    Specs. Met
    Each
    Zinc-Plated Steel
     
    M33 × 3.5 mm
    1 m110,000Class 8.8
    		Rockwell C20DIN 97699067A1410000000
     
    Steel
     
    M33 × 3.5 mm
    300 mm125,000ASTM Grade B7
    		Rockwell C35ASTM A193, DIN 97693325A453000000
    300 mm110,000Class 8.8
    		Rockwell C20DIN 97699055A33900000
    1 m125,000ASTM Grade B7
    		Rockwell C35ASTM A193, DIN 97693325A454000000
    1 m110,000Class 8.8
    		Rockwell C20DIN 97699055A341000000
    2 m125,000ASTM Grade B7
    		Rockwell C35ASTM A193, DIN 97693325A455000000
     
    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.,
    m
    Tensile Strength,
    psi
    Fastener Strength
    Grade/Class
    Hardness
    Specs.
    Met
    Each
    Steel
     
    M33 × 3.5 mm
    1150,000Class 10.9
    		Rockwell C32DIN 9761078N990000000
     
    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.
    Steel—Best for dry environments since moisture will cause these rods to rust.
    Lg.
    Tensile Strength,
    psi
    Hardness
    Specs.
    Met
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Steel
     
    M33 × 3.5 mm
    300 mm50,000Rockwell B49DIN 976194595A2510000000
    1 m50,000Rockwell B49DIN 976194595A252000000
     
    Steel
     
    M33 × 3.5 mm
    300 mm50,000Rockwell B49DIN 976198861A23500000
    1 m50,000Rockwell B49DIN 976198861A17500000
     
    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.,
    m
    Tensile Strength,
    psi
    Hardness
    Specs.
    Met
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
     
    M33 × 3.5 mm
    170,000Not RatedDIN 976190024A3180000000
     

    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.
    Material Certificate Icon
    Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
    Corrosion-Resistant Stainless Steel
    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
    M33 × 3.5 mm9950Fully ThreadedDIN 633493590A3360000000000000000000
     

    Extreme-Pressure Stainless Steel Threaded Pipe Fittings

    With the strength to handle extreme pressures, these fittings can be used to connect equipment in hydraulic fluid lines.
    Straight Adapters with Gasket
    Image of Product. Female x Male. Front orientation. Contains Annotated. Pipe and Fittings. Extreme-Pressure Stainless Steel Threaded Pipe Fittings, Straight Adapters with Gasket, Male, Threaded Fitting Connection, Female, Hex Body.

    Female x Male

    UN/UNF (SAE Straight) Thread—Also known as O-ring boss threads.
    316 Stainless Steel—Fittings are the most corrosion resistant. They stand up to wet environments, just like 304 stainless steel fittings, but unlike 304 stainless steel, they will not corrode from salt water, chlorine solutions, and chemicals.
    Thread
    Size
    316 Stainless Steel
    (A)
    (B)
    Dash Size
    (A)
    Body
    Shape
    Gasket
    Material
    Max. Pressure
    @ Temp.
    Each
    UN/UNF (SAE Straight) Female × Metric Male
    1 5/16"-12
    		M33 × 2 mm16HexBuna-N
    		3,000 psi @ 72° F51205K7880000000
     

    High-Pressure Brass and Bronze Threaded Pipe Fittings

    High pressures are no problem for these heavy-duty fittings. They are brass for good corrosion resistance.
    Through-Wall Straight Adapters
    Image of Product. Female x Male. Front orientation. Pipe and Fittings. High-Pressure Brass and Bronze Threaded Pipe Fittings, Through-Wall Straight Adapters, Male, Threaded Fitting Connection, Female, Hex Body.

    Female x Male

    Through-wall fittings are also known as bulkhead couplings; they mount through your wall or tank to create an inlet or outlet. When installing, the gasket should be on the inside of the wall.
    Nickel-Plated Brass—Nickel-plated brass pipe provides better corrosion resistance than unplated brass.
    Pipe Size
    (A)
    Thread Size
    (B)
    For Max.
    Wall Thk.
    Body
    Shape
    Material
    Max. Pressure
    @ Temp.
    Each
    BSPP Female × Metric Male
    3/4
    		M33 × 1.5 mm0.886"HexNickel-Plated Brass1,230 psi @ 72° F9151K267000000
     

    High-Pressure Iron and Steel Threaded Pipe Fittings

    These fittings can stand up to high-pressure applications. Use them in noncorrosive environments.
    Note: The maximum pressure listed for Class 3000 fittings is for conditions where there are no sudden changes in pressure or velocity. Please refer to ASME B16.11 to determine the specific maximum operating pressure for your application.
    Straight Adapters with Gasket
    Image of Product. Female × Male. Front orientation. Contains Annotated. Pipe and Fittings. High-Pressure Iron and Steel Threaded Pipe Fittings, Straight Adapters with Gasket, Threaded Fitting Connection, Female, Male, Hex Body.

    Female × Male

    Zinc-Plated Steel—Zinc-plated steel fittings have better corrosion resistance than plain steel fittings.
    Pipe Size
    (A)
    Thread Size
    (B)
    Dash Size
    (A)
    Body
    Shape
    Material
    Max. Pressure
    @ Temp.
    Gasket
    Material
    Each
    NPT Female × Metric Male
    1
    		M33 × 2 mm16HexZinc-Plated Steel2,500 psi @ 72° FBuna-N
    		4936K454000000
     
    Replacement Washers
    Image of Product. Front orientation. Sealing Washers.
    For Thread
    Size
    ID,
    mm
    OD,
    mm
    Thk.,
    mm
    Each
    For Metric Male
    M33
    		28.74224936K65900000
     
    back to top