McMaster-Carr logo
    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)
    91 Products

    Duct Damper Handles

    Image of Product. Front orientation. Duct Damper Handles.
    Pair with your own blade to create an economical damper for existing duct. These handles work with blades up to 0.022" thick to regulate airflow.
    Galvanized Steel—Corrosion resistant and affordable, galvanized steel is the most commonly used ductwork material.
    Galvanized Steel
    For Max. Damper
    Blade Thk.
    Each
    0.022"000000000000

    Airflow Dampers

    The simplest, most reliable way to regulate airflow in standard duct. Turn the lever to adjust the blade.
    Gasketed Airflow Damper—The blade has a rubber gasket to prevent leaks better than other dampers.
    Blade Airflow Damper—The most economical choice, these dampers slide into the end of duct. Drill a hole for the damper's bolt and remove the handle. Place the damper inside duct, insert the bolt through the hole, and reattach the handle.
    Galvanized Steel—Strong and corrosion resistant, galvanized steel is the most commonly used ductwork material.
    Galvanized Steel
    Duct
    Size
    Dia.
    OD
    Overall
    Lg.
    Ga.
    Gasket
    Material
    Each
    Standard Airflow Damper
     
    Image of Product. Front orientation. Duct Airflow Dampers. Airflow Dampers, Standard Airflow Damper, Male.
    Male
    4—3 3/4"4 1/2"20—00000000000000
    5—4 3/4"4 1/2"20—0000000000000
    6—5 3/4"4 1/2"20—0000000000000
    7—6 3/4"4 1/2"20—0000000000000
    8—7 3/4"4 1/2"20—0000000000000
    9—8 3/4"4 1/2"20—0000000000000
    10—9 3/4"4 1/2"20—0000000000000
    12—11 3/4"4 1/2"20—0000000000000
    14—13 3/4"4 1/2"20—00000000000000
    16—15 3/4"4 1/2"20—00000000000000
    18—17 3/4"4 1/2"20—00000000000000
    20—19 3/4"4 1/2"18—00000000000000
    22—21 3/4"4 1/2"18—00000000000000
    24—23 3/4"4 1/2"18—00000000000000
     
    Gasketed Airflow Damper
    Image of Product. Front orientation. Duct Airflow Dampers. Airflow Dampers, Gasketed Airflow Damper.
     
    Male
    4—3 7/8"10"20Neoprene
    		0000000000000
    6—5 7/8"10"20Neoprene
    		0000000000000
    8—7 7/8"10"20Neoprene
    		0000000000000
    10—9 7/8"10"20Neoprene
    		0000000000000
    12—11 7/8"10"20Neoprene
    		0000000000000
     
    Blade Airflow Damper
    Image of Product. Front orientation. Duct Airflow Dampers. Airflow Dampers, Blade Airflow Damper.
    44"——28—00000000000
    55"——28—00000000000
    66"——28—00000000000
    77"——28—00000000000
    88"——28—000000000000
    99"——26—00000000000
    1010"——26—000000000000
    1212"——26—000000000000
    1414"——24—000000000000
     

    Airflow Dampers for Quick-Disconnect Duct

    Image of Product. Front orientation. Duct Airflow Dampers. Airflow Dampers for Quick-Disconnect Duct.
    Regulate airflow to sections of quick-disconnect duct. Often used in dust collection systems, these dampers attach with quick-release clamps. Turn the lever to adjust airflow.
    Galvanized Steel—Strong and corrosion resistant, galvanized steel is the most commonly used ductwork material.
    Galvanized Steel
    Duct
    Size
    ID
    Overall
    Lg.
    Ga.
    Each
    33 3/16"8"2200000000000000
    43 15/16"8"220000000000000
    54 15/16"8"220000000000000
    66"8"220000000000000
    77"8"220000000000000
    88"13"220000000000000
    99"13"220000000000000
    1010"13"220000000000000
    1212 1/8"13"200000000000000
    1414 1/8"17"200000000000000
    1616 1/8"17"2000000000000000
    1818 1/8"23"2000000000000000
    2020 1/8"23"2000000000000000
    2222 1/8"23"2000000000000000
    2424 1/16"23"2000000000000000
    Duct Clamps
    Image of Product. Front orientation. Duct and Fittings.
    Match clamps to your duct material.
    Galvanized Steel
    Duct
    Size
    Each
    300000000000000
    4000000000000
    5000000000000
    6000000000000
    70000000000000
    80000000000000
    90000000000000
    100000000000000
    120000000000000
    140000000000000
    160000000000000
    180000000000000
    200000000000000
    220000000000000
    240000000000000

    Tight-Seal Spiral Duct and Fittings

    Image of System. Front orientation. Contains MultipleImages. Duct and Fittings. Tight-Seal Spiral Duct and Fittings.
    Gasketed fittings prevent leaks between connections without the need for tape or other sealants. Duct has a continuous seam that reinforces it for strength and long life. The rigid construction keeps its shape, even against suction from dust collectors. Duct is smooth on the inside for efficient airflow. Because of its attractive look, spiral duct is often used for exposed heating and cooling systems.
    Straight Collars with Airflow Damper
    Image of Product. Front orientation. Duct and Fittings. Tight-Seal Spiral Duct and Fittings, Straight Collars with Airflow Damper.
    Add a branch of round duct from rectangular systems and control airflow with the damper. Cut a hole, install the collar, and connect a piece of tight-seal spiral round duct.
    Galvanized Steel—Corrosion resistant and affordable, galvanized steel is the most commonly used ductwork material.
    Polyethylene Foam Gasket—The flange has an adhesive-backed gasket to bond the connection until you fasten with screws. The gasket also prevents leaks.
    Galvanized Steel
    with EPDM Gasket
    Duct
    Size
    OD
    Bottom Gasket
    Material
    Ga.
    Each
    65 7/8"Polyethylene Foam2400000000000000
    87 7/8"Polyethylene Foam240000000000000
    109 7/8"Polyethylene Foam240000000000000
    1211 7/8"Polyethylene Foam240000000000000
    1413 7/8"Polyethylene Foam240000000000000
    1615 7/8"Polyethylene Foam240000000000000

    Airflow Dampers for Square Duct

    Image of Product. Front orientation. Duct Airflow Dampers. Airflow Dampers for Square Duct.
    Direct airflow to different zones in your facility or regulate the amount of outside air introduced to your system. Turn the lever on these dampers to adjust the blades.
    Galvanized Steel—Strong and corrosion resistant, galvanized steel is the most commonly used ductwork material.
    For
    Duct
    Overall
    Galvanized Steel
    Ht.
    Wd.
    Ht.
    Wd.
    Dp.
    Ga.
    Gasket
    Material
    Each
    12"12"11 3/4"11 3/4"5 1/2"16Vinyl Plastic00000000000000
    14"14"13 3/4"13 3/4"5 1/2"16Vinyl Plastic0000000000000
    16"16"15 3/4"15 3/4"5 1/2"16Vinyl Plastic0000000000000
    24"24"23 3/4"23 3/4"5 1/2"16Vinyl Plastic0000000000000
    36"36"35 3/4"35 3/4"5 1/2"16Vinyl Plastic0000000000000

    Duct Fire Dampers

    In case of a fire, these dampers shut automatically to stop airflow. They have a fusible link that melts at 165° F, releasing a spring to close the blade. Dampers meet UL 555 fire safety standards to help prevent the spread of fire for 11/2 hours. They are undersized to fit inside duct.
    For Round Duct
    Image of Product. Front orientation. Duct Fire Dampers. For Round Duct.
    Galvanized Steel—Strong and corrosion resistant, galvanized steel is the most commonly used ductwork material.
    Overall
    Galvanized Steel
    Duct
    Size
    OD
    Ht.
    Wd.
    Fire Safety
    Std.
    Fusible Link
    Melting Temp., ° F
    Ga.
    Each
    43 3/4"6 3/4"6 3/4"UL 555
    		16522000000000000000
    65 3/4"8 3/4"8 3/4"UL 555
    		1652200000000000000
    87 3/4"10 3/4"10 3/4"UL 555
    		1652200000000000000
    109 3/4"12 3/4"12 3/4"UL 555
    		1652200000000000000
    1211 3/4"14 3/4"14 3/4"UL 555
    		1652200000000000000
    Fusible Links
    Each
    Replacement Fusible Link with 165° F Melting Temperature0000000000000
    Fusible Link with 212° F Melting Temperature 000000000000
    Fusible Link with 386° F Melting Temperature 0000000000000
    For Square Duct
    Image of Product. Front orientation. Duct Fire Dampers. For Square Duct.
    Galvanized Steel—Strong and corrosion resistant, galvanized steel is the most commonly used ductwork material.
    For
    Duct
    Overall
    Galvanized Steel
    Ht.
    Wd.
    Ht.
    Wd.
    Dp.
    Fire Safety
    Std.
    Fusible Link
    Melting Temp., ° F
    Ga.
    Each
    8"8"7 3/4"7 3/4"4 7/8"UL 555
    		165220000000000000
    12"12"11 3/4"11 3/4"4 7/8"UL 555
    		16522000000000000
    14"14"13 3/4"13 3/4"4 7/8"UL 555
    		16522000000000000
    18"18"17 3/4"17 3/4"4 7/8"UL 555
    		165220000000000000
    24"24"23 3/4"23 3/4"4 7/8"UL 555
    		165220000000000000
    Fusible Links
    Each
    Replacement Fusible Link with 165° F Melting Temperature0000000000000
    Fusible Link with 212° F Melting Temperature 000000000000
    Fusible Link with 386° F Melting Temperature 0000000000000

    Automatic Airflow Dampers

    Image of Product. Front orientation. Duct Airflow Dampers. Automatic Airflow Dampers.
    Keep temperatures comfortable while saving energy. Control these dampers with a switch or thermostat so you’re only heating and cooling the areas that need it.
    Galvanized Steel—Strong and corrosion resistant, galvanized steel is the most commonly used ductwork material.
    Overall
    Galvanized Steel
    Duct
    Size
    ID
    OD
    Ht.
    Wd.
    Electrical
    Connection Type
    Voltage,
    V AC
    Ga.
    Each
    55"4 7/8"9 1/4"7"Hardwire242400000000000000
    66"5 7/8"10 1/4"8"Hardwire24240000000000000
    88"7 7/8"12 1/4"10"Hardwire24240000000000000
    1010"9 7/8"14 1/4"12"Hardwire24240000000000000
    1212"11 7/8"16 1/4"14"Hardwire24240000000000000
    1414"13 7/8"18 1/4"16"Hardwire24220000000000000
    1616"15 7/8"20 1/4"18"Hardwire24220000000000000
    1818"17 7/8"22 1/4"20"Hardwire24220000000000000
    back to top