McMaster-Carr logo
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Comments
    E-mail address (if you would like a response)
    80 Products
    About Conduit
    industrial info icon

    Compare rigid and flexible conduit materials and identify the trade size for compatible fittings.

    Continuous-Flex Plastic (MPT) Conduit and Fittings

    Image of System. Front orientation. Conduit and Fittings. Continuous-Flex Plastic (MPT) Conduit and Fittings.
    Flex over and over without stretching or wearing out. This corrugated conduit protects wiring in moving equipment, such as pick-and-place grippers and robotic arms. Pair it with compatible fittings to seal out liquid and protect wiring indoors and outdoors. Conduit and fittings are made of nylon to resist moisture and chemicals.
    Straight Electrical Box Connectors
    Image of Product. Snap-In × Threaded. Front orientation. Conduit and Fittings. Continuous-Flex Plastic (MPT) Conduit and Fittings, Straight, Connector Fitting, Snap-In Conduit Connection × Threaded Knockout Connection.

    Snap-In ×

    Threaded

    Attach conduit to a knockout in an electrical box.
    Straights
    Locknuts
    Conduit
    Connection
    Knockout
    Connection
    For Conduit
    OD
    Gender
    OD
    Thread
    Type
    Gender
    Color
    Temp.,
    ° F
    Enclosure
    Rating
    Specs. Met
    Each
    Each
    Snap-In Conduit Connection × Threaded Knockout Connection
     
    Nylon
    0.39"Female0.91"PG (PG-11)MaleBlack-40 to 220IP66
    UL Recognized Component
    3185K122000003185K9100000
    0.51"Female0.91"PG (PG-11)MaleBlack-40 to 220IP66
    UL Recognized Component
    3185K12300003185K910000
    0.62"Female0.93"PG (PG-11)MaleBlack-40 to 220IP66
    UL Recognized Component
    3185K1100003185K910000
    0.84"Female1.16"PG (PG-16)MaleBlack-40 to 220IP66
    UL Recognized Component
    3185K1200003185K930000
    1.12"Female1.46"PG (PG-21)MaleBlack-40 to 220IP66
    UL Recognized Component
    3185K13000003185K940000
    1.36"Female1.73"PG (PG-29)MaleBlack-40 to 220IP66
    UL Recognized Component
    3185K14000003185K950000
    1.67"Female2.17"PG (PG-36)MaleBlack-40 to 220IP66
    UL Recognized Component
    3185K15000003185K9600000
    2.15"Female2.72"PG (PG-48)MaleBlack-40 to 220IP66
    UL Recognized Component
    3185K124000003185K13300000
     
    90° Elbow Electrical Box Connectors
    Image of Product. Snap-In × Threaded. Front orientation. Conduit and Fittings. Continuous-Flex Plastic (MPT) Conduit and Fittings, 90° Elbow, Connector Fitting, Snap-In Conduit Connection × Threaded Knockout Connection.

    Snap-In × Threaded

    Change the direction of your run to connect to a knockout in an electrical box.
    Elbows
    Locknuts
    Conduit
    Connection
    Knockout
    Connection
    For Conduit
    OD
    Gender
    OD
    Thread
    Type
    Gender
    Lg.
    Color
    Temp.,
    ° F
    Enclosure
    Rating
    Specs. Met
    Each
    Each
    Snap-In Conduit Connection × Threaded Knockout Connection
     
    Nylon
    0.39"Female0.91"PG (PG-11)Male1 1/2"Black-40 to 220IP66
    CE Marked, CSA Certified, UL Recognized Component3185K1260000003185K9100000
    0.51"Female0.91"PG (PG-11)Male1 5/8"Black-40 to 220IP66
    CE Marked, CSA Certified, UL Recognized Component3185K127000003185K910000
    0.62"Female0.93"PG (PG-11)Male1 13/16"Black-40 to 220IP66
    CE Marked, CSA Certified, UL Recognized Component3185K16000003185K910000
    0.84"Female1.16"PG (PG-16)Male2 5/16"Black-40 to 220IP66
    CE Marked, CSA Certified, UL Recognized Component3185K17000003185K930000
    1.12"Female1.46"PG (PG-21)Male2 5/8"Black-40 to 220IP66
    CE Marked, CSA Certified, UL Recognized Component3185K18000003185K940000
    1.36"Female1.73"PG (PG-29)Male2 15/16"Black-40 to 220IP66
    CE Marked, CSA Certified, UL Recognized Component3185K19000003185K950000
    1.67"Female2.17"PG (PG-36)Male3 7/8"Black-40 to 220IP66
    CE Marked, CSA Certified, UL Recognized Component3185K21000003185K9600000
    2.15"Female2.72"PG (PG-48)Male4 3/8"Black-40 to 220IP66
    CE Marked, CSA Certified, UL Recognized Component3185K128000003185K13300000
     

    Conduit Locknuts

    Secure threaded conduit fittings to knockouts. These locknuts keep fittings from shifting, so connections stay stable and wiring is protected inside electrical boxes or enclosures.
    For Metal and Plastic Fittings
    Image of Product. Front orientation. Conduit and Fittings. Conduit Locknuts, For Metal and Plastic Fittings.
    304 Stainless Steel—The choice for wet and outdoor environments.
    Thread
    Size
    Each
    PG Thread
     
    304 Stainless Steel
    PG-7
    7513K14100000
    PG-9
    7513K14200000
    PG-11
    7513K1430000
    PG-13.5
    7513K14400000
    PG-16
    7513K14500000
    PG-21
    7513K14600000
    PG-29
    7513K14700000
    PG-36
    7513K14800000
     
    For Plastic Fittings
    Image of Product. Front orientation. Conduit and Fittings. Conduit Locknuts, For Plastic Fittings.
    Nylon—Lightweight and chemical resistant, these fittings won't corrode.
    Thread
    Size
    Each
    PG Thread
     
    Nylon
    PG-7
    7877N1100000
    PG-7
    7877N1160000
    PG-9
    7877N1170000
    PG-9
    7877N1180000
    PG-11
    3185K910000
    PG-11
    7877N1190000
    PG-13.5
    3185K920000
    PG-13.5
    7877N120000
    PG-16
    3185K930000
    PG-16
    7877N1210000
    PG-21
    3185K940000
    PG-21
    7877N1220000
    PG-29
    3185K950000
    PG-29
    7877N1230000
    PG-36
    3185K9600000
    PG-36
    7877N12400000
    PG-48
    3185K13300000
     

    Submersible Threaded Breather Vents

    Use these vents to maintain consistent pressure as temperatures fluctuate by allowing air to flow through sealed enclosures. All have a hydrophobic and oleophobic filter membrane that blocks moisture and contamination from particle buildup.
    PG
    Image of Product. Front orientation. Breather Vents. Submersible Threaded Breather Vents, PG, Nylon.

    Nylon

    Nylon—Nylon vents don’t conduct electricity, making them a good choice for most environments.
    Thread
    Size
    For Hole
    Dia.
    Head
    Dia.
    Environment
    Enclosure Rating
    Certification
    Color
    Flammability
    Rating
    UL File
    No.
    Features
    Each
     
    Nylon
    PG-7
    1/2"3/4"Corrosive, Dusty, Outdoor, Submersible, Washdown, WetIP65, IP68, NEMA 4X
    UL Recognized Component
    GrayUL 94 V-2
    E330194Gasket7066K61100000
    PG-9
    1/2"7/8"Corrosive, Dusty, Outdoor, Submersible, Washdown, WetIP65, IP68, NEMA 4X
    UL Recognized Component
    GrayUL 94 V-2
    E330194Gasket7066K6120000
    PG-13.5
    5/8"1 1/8"Corrosive, Dusty, Outdoor, Submersible, Washdown, WetIP65, IP68, NEMA 4X
    UL Recognized Component
    GrayUL 94 V-2
    E330194Gasket7066K6130000
    PG-21
    3/4"1 7/16"Corrosive, Dusty, Outdoor, Submersible, Washdown, WetIP65, IP68, NEMA 4X
    UL Recognized Component
    GrayUL 94 V-2
    E330194Gasket7066K6140000
     

    Ultra-Flexible Plastic (MPT) Conduit and Fittings

    Image of System. Front orientation. Conduit and Fittings. Ultra-Flexible Plastic (MPT) Conduit and Fittings.
    The most flexible conduit we offer. The spiral construction bends, twists, and wraps machine wiring through tight spaces. Pair conduit with compatible fittings to seal out liquid and protect wiring indoors and outdoors. Conduit and fittings are made of PVC or nylon to resist moisture and chemicals.
    Straight Electrical Box Connectors
    Image of Product. Push-In × Threaded. Front orientation. Conduit and Fittings. Ultra-Flexible Plastic (MPT) Conduit and Fittings, Straight, Connector Fitting, Push-In Conduit Connection × Threaded Knockout Connection.

    Push-In ×

    Threaded

    Attach conduit to a knockout in an electrical box.
    Conduit
    Connection
    Knockout
    Connection
    Conduit
    Trade Size
    Gender
    Thread
    Type
    Gender
    Color
    Includes
    Specs. Met
    Each
    Push-In Conduit Connection × Threaded Knockout Connection
     
    Nylon
    1/4
    FemalePG (PG-7)MaleBlackZinc-Plated Steel LocknutC-UL Listed, UL Listed75145K5100000
     

    Conduit and Cord Grip Thread Adapters

    Image of Product. Front orientation. Conduit and Fittings. Conduit and Cord Grip Thread Adapters.
    Connect mismatched conduit and cord grip threads while sealing out moisture. These adapters have a rubber O-ring that prevents water damage inside your electrical box or enclosure. They convert metric, NPT, and PG threads.
    Nickel-Plated Brass—The plating enhances the corrosion resistance of brass, adding a durable protective finish.
    Nylon—Lightweight and chemical resistant, these fittings won't corrode.
    Conduit
    Connection
    Knockout
    Connection
    Pipe
    Size
    Thread
    Size
    Gender
    Pipe
    Size
    Thread
    Size
    Gender
    Temp.,
    ° F
    Each
    NPT × PG
     
    Nickel-Plated Brass
    1/2
    FemalePG-9
    Male-40 to 2107805K77000000
    1/2
    FemalePG-11
    Male-40 to 2107805K7100000
    1/2
    FemalePG-13.5
    Male-40 to 2107805K7200000
    1/2
    FemalePG-16
    Male-40 to 2107805K7300000
    1/2
    FemalePG-21
    Male-40 to 2107805K7400000
    3/4
    FemalePG-21
    Male-40 to 2107805K7500000
    1
    FemalePG-29
    Male-40 to 2107805K7600000
     
    Nylon
    1/2
    FemalePG-11
    Male0 to 1757805K570000
    1/2
    FemalePG-13.5
    Male0 to 1757805K580000
     
    Metric × PG
     
    Nickel-Plated Brass
    M16
    FemalePG-9
    Male-40 to 2107805K180000
    M20
    FemalePG-11
    Male-40 to 2107805K190000
    M20
    FemalePG-13.5
    Male-40 to 2107805K210000
    M25
    FemalePG-16
    Male-40 to 2107805K2200000
     
    Nylon
    M16
    FemalePG-9
    Male0 to 1757805K3600000
    M20
    FemalePG-16
    Male0 to 1757805K4200000
    M25
    FemalePG-16
    Male0 to 1757805K4300000
    M32
    FemalePG-21
    Male0 to 1757805K4500000
    M32
    FemalePG-29
    Male0 to 1757805K4600000
     
    PG × NPT
     
    Nickel-Plated Brass
    PG-7
    Female1/4
    Male-40 to 2107842K1100000
    PG-9
    Female1/2
    Male-40 to 2107842K1200000
    PG-11
    Female1/2
    Male-40 to 2107842K100000
    PG-13.5
    Female1/2
    Male-40 to 2107842K200000
    PG-21
    Female1/2
    Male-40 to 2107842K1300000
    PG-21
    Female3/4
    Male-40 to 2107842K700000
    PG-29
    Female1
    Male-40 to 2107842K1400000
     
    PG × Metric
     
    Nickel-Plated Brass
    PG-9
    FemaleM16
    Male-40 to 2107805K110000
    PG-16
    FemaleM20
    Male-40 to 2107805K1400000
    PG-16
    FemaleM25
    Male-40 to 2107805K1500000
    PG-21
    FemaleM25
    Male-40 to 2107805K1600000
    PG-29
    FemaleM32
    Male-40 to 2107805K1700000
     
    Nylon
    PG-13.5
    FemaleM25
    Male0 to 1757805K2600000
    PG-21
    FemaleM32
    Male0 to 1757805K2800000
    PG-29
    FemaleM40
    Male0 to 1757805K2900000
    PG-36
    FemaleM50
    Male0 to 1757805K3100000
     
    back to top